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Essay on Global Warming

• Updated on  
• Apr 27, 2024

Being able to write an essay is an integral part of mastering any language. Essays form an integral part of many academic and scholastic exams like the SAT, and UPSC amongst many others. It is a crucial evaluative part of English proficiency tests as well like IELTS, TOEFL, etc. Major essays are meant to emphasize public issues of concern that can have significant consequences on the world. To understand the concept of Global Warming and its causes and effects, we must first examine the many factors that influence the planet’s temperature and what this implies for the world’s future. Here’s an unbiased look at the essay on Global Warming and other essential related topics.

Short Essay on Global Warming and Climate Change?

Since the industrial and scientific revolutions, Earth’s resources have been gradually depleted. Furthermore, the start of the world’s population’s exponential expansion is particularly hard on the environment. Simply put, as the population’s need for consumption grows, so does the use of natural resources , as well as the waste generated by that consumption.

Climate change has been one of the most significant long-term consequences of this. Climate change is more than just the rise or fall of global temperatures; it also affects rain cycles, wind patterns, cyclone frequencies, sea levels, and other factors. It has an impact on all major life groupings on the planet.

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What is Global Warming?

Global warming is the unusually rapid increase in Earth’s average surface temperature over the past century, primarily due to the greenhouse gases released by people burning fossil fuels . The greenhouse gases consist of methane, nitrous oxide, ozone, carbon dioxide, water vapour, and chlorofluorocarbons. The weather prediction has been becoming more complex with every passing year, with seasons more indistinguishable, and the general temperatures hotter.

The number of hurricanes, cyclones, droughts, floods, etc., has risen steadily since the onset of the 21st century. The supervillain behind all these changes is Global Warming. The name is quite self-explanatory; it means the rise in the temperature of the Earth.

Also Read: What is a Natural Disaster?

What are the Causes of Global Warming?

According to recent studies, many scientists believe the following are the primary four causes of global warming:

• Deforestation 
• Greenhouse emissions
• Carbon emissions per capita

Extreme global warming is causing natural disasters , which can be seen all around us. One of the causes of global warming is the extreme release of greenhouse gases that become trapped on the earth’s surface, causing the temperature to rise. Similarly, volcanoes contribute to global warming by spewing excessive CO2 into the atmosphere.

The increase in population is one of the major causes of Global Warming. This increase in population also leads to increased air pollution . Automobiles emit a lot of CO2, which remains in the atmosphere. This increase in population is also causing deforestation, which contributes to global warming.

The earth’s surface emits energy into the atmosphere in the form of heat, keeping the balance with the incoming energy. Global warming depletes the ozone layer, bringing about the end of the world. There is a clear indication that increased global warming will result in the extinction of all life on Earth’s surface.

Also Read: Land, Soil, Water, Natural Vegetation, and Wildlife Resources

Solutions for Global Warming

Of course, industries and multinational conglomerates emit more carbon than the average citizen. Nonetheless, activism and community effort are the only viable ways to slow the worsening effects of global warming. Furthermore, at the state or government level, world leaders must develop concrete plans and step-by-step programmes to ensure that no further harm is done to the environment in general.

Although we are almost too late to slow the rate of global warming, finding the right solution is critical. Everyone, from individuals to governments, must work together to find a solution to Global Warming. Some of the factors to consider are pollution control, population growth, and the use of natural resources.

One very important contribution you can make is to reduce your use of plastic. Plastic is the primary cause of global warming, and recycling it takes years. Another factor to consider is deforestation, which will aid in the control of global warming. More tree planting should be encouraged to green the environment. Certain rules should also govern industrialization. Building industries in green zones that affect plants and species should be prohibited.

Also Read: Essay on Pollution

Effects of Global Warming

Global warming is a real problem that many people want to disprove to gain political advantage. However, as global citizens, we must ensure that only the truth is presented in the media.

This decade has seen a significant impact from global warming. The two most common phenomena observed are glacier retreat and arctic shrinkage. Glaciers are rapidly melting. These are clear manifestations of climate change.

Another significant effect of global warming is the rise in sea level. Flooding is occurring in low-lying areas as a result of sea-level rise. Many countries have experienced extreme weather conditions. Every year, we have unusually heavy rain, extreme heat and cold, wildfires, and other natural disasters.

Similarly, as global warming continues, marine life is being severely impacted. This is causing the extinction of marine species as well as other problems. Furthermore, changes are expected in coral reefs, which will face extinction in the coming years. These effects will intensify in the coming years, effectively halting species expansion. Furthermore, humans will eventually feel the negative effects of Global Warming.

Also Read: Concept of Sustainable Development

Sample Essays on Global Warming

Here are some sample essays on Global Warming:

Essay on Global Warming Paragraph in 100 – 150 words

Global Warming is caused by the increase of carbon dioxide levels in the earth’s atmosphere and is a result of human activities that have been causing harm to our environment for the past few centuries now. Global Warming is something that can’t be ignored and steps have to be taken to tackle the situation globally. The average temperature is constantly rising by 1.5 degrees Celsius over the last few years.

The best method to prevent future damage to the earth, cutting down more forests should be banned and Afforestation should be encouraged. Start by planting trees near your homes and offices, participate in events, and teach the importance of planting trees. It is impossible to undo the damage but it is possible to stop further harm.

Also Read: Social Forestry

Essay on Global Warming in 250 Words

Over a long period, it is observed that the temperature of the earth is increasing. This affected wildlife, animals, humans, and every living organism on earth. Glaciers have been melting, and many countries have started water shortages, flooding, and erosion and all this is because of global warming. 

No one can be blamed for global warming except for humans. Human activities such as gases released from power plants, transportation, and deforestation have increased gases such as carbon dioxide, CFCs, and other pollutants in the earth’s atmosphere.                                              The main question is how can we control the current situation and build a better world for future generations. It starts with little steps by every individual. 

Start using cloth bags made from sustainable materials for all shopping purposes, instead of using high-watt lights use energy-efficient bulbs, switch off the electricity, don’t waste water, abolish deforestation and encourage planting more trees. Shift the use of energy from petroleum or other fossil fuels to wind and solar energy. Instead of throwing out the old clothes donate them to someone so that it is recycled. 

Donate old books, don’t waste paper.  Above all, spread awareness about global warming. Every little thing a person does towards saving the earth will contribute in big or small amounts. We must learn that 1% effort is better than no effort. Pledge to take care of Mother Nature and speak up about global warming.

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Essay on Global Warming in 500 Words

Global warming isn’t a prediction, it is happening! A person denying it or unaware of it is in the most simple terms complicit. Do we have another planet to live on? Unfortunately, we have been bestowed with this one planet only that can sustain life yet over the years we have turned a blind eye to the plight it is in. Global warming is not an abstract concept but a global phenomenon occurring ever so slowly even at this moment. Global Warming is a phenomenon that is occurring every minute resulting in a gradual increase in the Earth’s overall climate. Brought about by greenhouse gases that trap the solar radiation in the atmosphere, global warming can change the entire map of the earth, displacing areas, flooding many countries, and destroying multiple lifeforms. Extreme weather is a direct consequence of global warming but it is not an exhaustive consequence. There are virtually limitless effects of global warming which are all harmful to life on earth. The sea level is increasing by 0.12 inches per year worldwide. This is happening because of the melting of polar ice caps because of global warming. This has increased the frequency of floods in many lowland areas and has caused damage to coral reefs. The Arctic is one of the worst-hit areas affected by global warming. Air quality has been adversely affected and the acidity of the seawater has also increased causing severe damage to marine life forms. Severe natural disasters are brought about by global warming which has had dire effects on life and property. As long as mankind produces greenhouse gases, global warming will continue to accelerate. The consequences are felt at a much smaller scale which will increase to become drastic shortly. The power to save the day lies in the hands of humans, the need is to seize the day. Energy consumption should be reduced on an individual basis. Fuel-efficient cars and other electronics should be encouraged to reduce the wastage of energy sources. This will also improve air quality and reduce the concentration of greenhouse gases in the atmosphere. Global warming is an evil that can only be defeated when fought together. It is better late than never. If we all take steps today, we will have a much brighter future tomorrow. Global warming is the bane of our existence and various policies have come up worldwide to fight it but that is not enough. The actual difference is made when we work at an individual level to fight it. Understanding its import now is crucial before it becomes an irrevocable mistake. Exterminating global warming is of utmost importance and each one of us is as responsible for it as the next.  

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Essay on Global Warming UPSC

Always hear about global warming everywhere, but do we know what it is? The evil of the worst form, global warming is a phenomenon that can affect life more fatally. Global warming refers to the increase in the earth’s temperature as a result of various human activities. The planet is gradually getting hotter and threatening the existence of lifeforms on it. Despite being relentlessly studied and researched, global warming for the majority of the population remains an abstract concept of science. It is this concept that over the years has culminated in making global warming a stark reality and not a concept covered in books. Global warming is not caused by one sole reason that can be curbed. Multifarious factors cause global warming most of which are a part of an individual’s daily existence. Burning of fuels for cooking, in vehicles, and for other conventional uses, a large amount of greenhouse gases like carbon dioxide, and methane amongst many others is produced which accelerates global warming. Rampant deforestation also results in global warming as lesser green cover results in an increased presence of carbon dioxide in the atmosphere which is a greenhouse gas.  Finding a solution to global warming is of immediate importance. Global warming is a phenomenon that has to be fought unitedly. Planting more trees can be the first step that can be taken toward warding off the severe consequences of global warming. Increasing the green cover will result in regulating the carbon cycle. There should be a shift from using nonrenewable energy to renewable energy such as wind or solar energy which causes less pollution and thereby hinder the acceleration of global warming. Reducing energy needs at an individual level and not wasting energy in any form is the most important step to be taken against global warming. The warning bells are tolling to awaken us from the deep slumber of complacency we have slipped into. Humans can fight against nature and it is high time we acknowledged that. With all our scientific progress and technological inventions, fighting off the negative effects of global warming is implausible. We have to remember that we do not inherit the earth from our ancestors but borrow it from our future generations and the responsibility lies on our shoulders to bequeath them a healthy planet for life to exist. 

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Climate Change and Global Warming Essay

Global Warming and Climate Change are two sides of the same coin. Both are interrelated with each other and are two issues of major concern worldwide. Greenhouse gases released such as carbon dioxide, CFCs, and other pollutants in the earth’s atmosphere cause Global Warming which leads to climate change. Black holes have started to form in the ozone layer that protects the earth from harmful ultraviolet rays. 

Human activities have created climate change and global warming. Industrial waste and fumes are the major contributors to global warming. 

Another factor affecting is the burning of fossil fuels, deforestation and also one of the reasons for climate change.  Global warming has resulted in shrinking mountain glaciers in Antarctica, Greenland, and the Arctic and causing climate change. Switching from the use of fossil fuels to energy sources like wind and solar. 

When buying any electronic appliance buy the best quality with energy savings stars. Don’t waste water and encourage rainwater harvesting in your community. 

Also Read: Essay on Air Pollution

Tips to Write an Essay

Writing an effective essay needs skills that few people possess and even fewer know how to implement. While writing an essay can be an assiduous task that can be unnerving at times, some key pointers can be inculcated to draft a successful essay. These involve focusing on the structure of the essay, planning it out well, and emphasizing crucial details.

Mentioned below are some pointers that can help you write better structure and more thoughtful essays that will get across to your readers:

• Prepare an outline for the essay to ensure continuity and relevance and no break in the structure of the essay
• Decide on a thesis statement that will form the basis of your essay. It will be the point of your essay and help readers understand your contention
• Follow the structure of an introduction, a detailed body followed by a conclusion so that the readers can comprehend the essay in a particular manner without any dissonance.
• Make your beginning catchy and include solutions in your conclusion to make the essay insightful and lucrative to read
• Reread before putting it out and add your flair to the essay to make it more personal and thereby unique and intriguing for readers  

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Ans. Both natural and man-made factors contribute to global warming. The natural one also contains methane gas, volcanic eruptions, and greenhouse gases. Deforestation, mining, livestock raising, burning fossil fuels, and other man-made causes are next.

Ans. The government and the general public can work together to stop global warming. Trees must be planted more often, and deforestation must be prohibited. Auto usage needs to be curbed, and recycling needs to be promoted.

Ans. Switching to renewable energy sources , adopting sustainable farming, transportation, and energy methods, and conserving water and other natural resources.

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Digvijay Singh

Having 2+ years of experience in educational content writing, withholding a Bachelor's in Physical Education and Sports Science and a strong interest in writing educational content for students enrolled in domestic and foreign study abroad programmes. I believe in offering a distinct viewpoint to the table, to help students deal with the complexities of both domestic and foreign educational systems. Through engaging storytelling and insightful analysis, I aim to inspire my readers to embark on their educational journeys, whether abroad or at home, and to make the most of every learning opportunity that comes their way.

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This was really a good essay on global warming… There has been used many unic words..and I really liked it!!!Seriously I had been looking for a essay about Global warming just like this…

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I want to learn how to write essay writing so I joined this page.This page is very useful for everyone.

Hi, we are glad that we could help you to write essays. We have a beginner’s guide to write essays ( https://leverageedu.com/blog/essay-writing/ ) and we think this might help you.

It is not good , to have global warming in our earth .So we all have to afforestation program on all the world.

thank you so much

Very educative , helpful and it is really going to strength my English knowledge to structure my essay in future

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Global warming is the increase in 𝓽𝓱𝓮 ᴀᴠᴇʀᴀɢᴇ ᴛᴇᴍᴘᴇʀᴀᴛᴜʀᴇs ᴏғ ᴇᴀʀᴛʜ🌎 ᴀᴛᴍᴏsᴘʜᴇʀᴇ

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• U.S. Department of Transportation - Global Warming: A Science Overview
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• Table Of Contents

Human activity affects global surface temperatures by changing Earth ’s radiative balance—the “give and take” between what comes in during the day and what Earth emits at night. Increases in greenhouse gases —i.e., trace gases such as carbon dioxide and methane that absorb heat energy emitted from Earth’s surface and reradiate it back—generated by industry and transportation cause the atmosphere to retain more heat, which increases temperatures and alters precipitation patterns.

Global warming, the phenomenon of increasing average air temperatures near Earth’s surface over the past one to two centuries, happens mostly in the troposphere , the lowest level of the atmosphere, which extends from Earth’s surface up to a height of 6–11 miles. This layer contains most of Earth’s clouds and is where living things and their habitats and weather primarily occur.

Continued global warming is expected to impact everything from energy use to water availability to crop productivity throughout the world. Poor countries and communities with limited abilities to adapt to these changes are expected to suffer disproportionately. Global warming is already being associated with increases in the incidence of severe and extreme weather, heavy flooding , and wildfires —phenomena that threaten homes, dams, transportation networks, and other facets of human infrastructure. Learn more about how the IPCC’s Sixth Assessment Report, released in 2021, describes the social impacts of global warming.

Polar bears live in the Arctic , where they use the region’s ice floes as they hunt seals and other marine mammals . Temperature increases related to global warming have been the most pronounced at the poles, where they often make the difference between frozen and melted ice. Polar bears rely on small gaps in the ice to hunt their prey. As these gaps widen because of continued melting, prey capture has become more challenging for these animals.

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global warming , the phenomenon of increasing average air temperatures near the surface of Earth over the past one to two centuries. Climate scientists have since the mid-20th century gathered detailed observations of various weather phenomena (such as temperatures, precipitation , and storms) and of related influences on climate (such as ocean currents and the atmosphere’s chemical composition). These data indicate that Earth’s climate has changed over almost every conceivable timescale since the beginning of geologic time and that human activities since at least the beginning of the Industrial Revolution have a growing influence over the pace and extent of present-day climate change .

Giving voice to a growing conviction of most of the scientific community , the Intergovernmental Panel on Climate Change (IPCC) was formed in 1988 by the World Meteorological Organization (WMO) and the United Nations Environment Program (UNEP). The IPCC’s Sixth Assessment Report (AR6), published in 2021, noted that the best estimate of the increase in global average surface temperature between 1850 and 2019 was 1.07 °C (1.9 °F). An IPCC special report produced in 2018 noted that human beings and their activities have been responsible for a worldwide average temperature increase between 0.8 and 1.2 °C (1.4 and 2.2 °F) since preindustrial times, and most of the warming over the second half of the 20th century could be attributed to human activities.

AR6 produced a series of global climate predictions based on modeling five greenhouse gas emission scenarios that accounted for future emissions, mitigation (severity reduction) measures, and uncertainties in the model projections. Some of the main uncertainties include the precise role of feedback processes and the impacts of industrial pollutants known as aerosols , which may offset some warming. The lowest-emissions scenario, which assumed steep cuts in greenhouse gas emissions beginning in 2015, predicted that the global mean surface temperature would increase between 1.0 and 1.8 °C (1.8 and 3.2 °F) by 2100 relative to the 1850–1900 average. This range stood in stark contrast to the highest-emissions scenario, which predicted that the mean surface temperature would rise between 3.3 and 5.7 °C (5.9 and 10.2 °F) by 2100 based on the assumption that greenhouse gas emissions would continue to increase throughout the 21st century. The intermediate-emissions scenario, which assumed that emissions would stabilize by 2050 before declining gradually, projected an increase of between 2.1 and 3.5 °C (3.8 and 6.3 °F) by 2100.

Many climate scientists agree that significant societal, economic, and ecological damage would result if the global average temperature rose by more than 2 °C (3.6 °F) in such a short time. Such damage would include increased extinction of many plant and animal species, shifts in patterns of agriculture , and rising sea levels. By 2015 all but a few national governments had begun the process of instituting carbon reduction plans as part of the Paris Agreement , a treaty designed to help countries keep global warming to 1.5 °C (2.7 °F) above preindustrial levels in order to avoid the worst of the predicted effects. Whereas authors of the 2018 special report noted that should carbon emissions continue at their present rate, the increase in average near-surface air temperature would reach 1.5 °C sometime between 2030 and 2052, authors of the AR6 report suggested that this threshold would be reached by 2041 at the latest.

The AR6 report also noted that the global average sea level had risen by some 20 cm (7.9 inches) between 1901 and 2018 and that sea level rose faster in the second half of the 20th century than in the first half. It also predicted, again depending on a wide range of scenarios, that the global average sea level would rise by different amounts by 2100 relative to the 1995–2014 average. Under the report’s lowest-emission scenario, sea level would rise by 28–55 cm (11–21.7 inches), whereas, under the intermediate emissions scenario, sea level would rise by 44–76 cm (17.3–29.9 inches). The highest-emissions scenario suggested that sea level would rise by 63–101 cm (24.8–39.8 inches) by 2100.

The scenarios referred to above depend mainly on future concentrations of certain trace gases, called greenhouse gases , that have been injected into the lower atmosphere in increasing amounts through the burning of fossil fuels for industry, transportation , and residential uses. Modern global warming is the result of an increase in magnitude of the so-called greenhouse effect , a warming of Earth’s surface and lower atmosphere caused by the presence of water vapour , carbon dioxide , methane , nitrous oxides , and other greenhouse gases. In 2014 the IPCC first reported that concentrations of carbon dioxide, methane, and nitrous oxides in the atmosphere surpassed those found in ice cores dating back 800,000 years.

Of all these gases, carbon dioxide is the most important, both for its role in the greenhouse effect and for its role in the human economy. It has been estimated that, at the beginning of the industrial age in the mid-18th century, carbon dioxide concentrations in the atmosphere were roughly 280 parts per million (ppm). By the end of 2022 they had risen to 419 ppm, and, if fossil fuels continue to be burned at current rates, they are projected to reach 550 ppm by the mid-21st century—essentially, a doubling of carbon dioxide concentrations in 300 years.

A vigorous debate is in progress over the extent and seriousness of rising surface temperatures, the effects of past and future warming on human life, and the need for action to reduce future warming and deal with its consequences. This article provides an overview of the scientific background related to the subject of global warming. It considers the causes of rising near-surface air temperatures, the influencing factors, the process of climate research and forecasting, and the possible ecological and social impacts of rising temperatures. For an overview of the public policy developments related to global warming occurring since the mid-20th century, see global warming policy . For a detailed description of Earth’s climate, its processes, and the responses of living things to its changing nature, see climate . For additional background on how Earth’s climate has changed throughout geologic time , see climatic variation and change . For a full description of Earth’s gaseous envelope, within which climate change and global warming occur, see atmosphere .

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Fossil fuels – coal, oil and gas – are by far the largest contributor to global climate change, accounting for over 75 per cent of global greenhouse gas emissions and nearly 90 per cent of all carbon dioxide emissions. As greenhouse gas emissions blanket the Earth, they trap the sun’s heat. This leads to global warming and climate change. The world is now warming faster than at any point in recorded history. Warmer temperatures over time are changing weather patterns and disrupting the usual balance of nature. This poses many risks to human beings and all other forms of life on Earth. 

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Global Warming Essay in English (Causes and Solutions) - 100, 200, 500 Words

• Essay on Global Warming

The planet is now undergoing changes and modernization is happening at a rapid rate. We desire development in all areas of life. In the name of expansion, an increasing number of industries are being founded. But as humanity has grown, the state of the planet's ecology has substantially deteriorated. When discussing significant environmental dangers, the phrase "Global Warming" is frequently used. The causes and consequences of global warming are still largely unknown to many people. Here are a few sample essays on global warming:

100 Words Essay on Global Warming

200 words essay on global warming, 500 words essay on global warming.

An increase in the Earth's average global temperature is known as global warming. Global warming is mostly caused by burning more fossil fuels and the emission of hazardous pollutants into the atmosphere. Living things can suffer greatly as a result of global warming. The temperature suddenly rises in some places, while in others, it suddenly drops. The use of fossil fuels for energy is the main cause of global warming. It has been noticed that over the last ten years, the Earth's average temperature has risen by 1.5 degrees Celsius. This is cause for concern because it can harm ecosystems and lead to environmental disturbance. If we take decisive action to replace the destroyed vegetation in our forests, we can stop global warming. To slow the rate of global warming, we can also use sustainable energy sources like sun, wind, and tidal energy.

Over time, the cumulative increase in Earth's average global temperatures is referred to as global warming. It has been said that large-scale deforestation by humans for various reasons is to blame. Every year, we use a lot of fuel. It is becoming impossible to meet people's fuel needs as the human population has increased. Natural resources must be used carefully as they are limited. The ecosystem will become unbalanced if humans overuse mineral wealth like forests and waterways. Temperature increases alone are not the only sign of global warming. It also has other consequences.

Natural disasters, including storms, floods, and avalanches , are happening all over the planet. These all have a direct connection to global warming. To protect our environment we must rebuild our ecology to defend it against the negative effects of global warming. To make this globe a nicer place for the generations to come, who also appreciate this Earth in the same way we do, we must all work together. Planting trees is the fundamental action we can do to improve the condition of our world as a whole. Our main objective should be reforestation. If we commit to growing as many plants as we can during our lifetimes, the Earth will become a better place.

The gradual increase in surface climate caused by various factors is known as global warming. It poses serious risks to both the environment and humanity. Climate change effects include global warming . The main contributor to global warming is the unavoidable release of greenhouse gases. Methane and carbon dioxide are two of the main greenhouse gases. There are numerous other causes and ramifications of this warming, which endangers Earth's life.

Reasons Responsible For Global Warming

The causes of global warming are several. These problems are caused by both nature and humanity. Because of the presence of carbon dioxide in the atmosphere , the heat rays that the Earth's surface reflects become trapped there. The "greenhouse effect" is what results from this phenomenon. It is necessary to keep our world from turning into a frozen ball. Global warming results from too much carbon dioxide trapping all the heat from the Earth's surface. The primary gases that cause global warming are referred to as greenhouse gases.

The main greenhouse gases are methane, nitrous oxide, ozone, and carbon dioxide . These gases cause global warming when their concentrations are out of balance. Volcanic eruptions, solar radiation, and other natural occurrences are a few examples that contribute to global warming. People's excessive use of cars and fossil fuels also raises carbon dioxide levels. Among the most prevalent and quickly spreading issues causing global warming is deforestation. The level of carbon dioxide in the air is rising because trees are being cut down. Additional reasons contributing to global warming include the expanding population, industrialisation, pollution, etc.

How Climate Change Impacts Us

Numerous variations in the weather are brought on by global warming, including lengthier summers and fewer winters, greater temperatures, modifications to the trade winds, rain that falls throughout the year, melting polar ice caps, a weaker ozone barrier, etc. Additionally, it may result in a rise in natural disasters, including severe storms, cyclones, floods, and many others. Plants, animals, and other environmental elements are directly impacted by the harm produced by global warming. The rising sea level, swift glacier melting, and other effects of global warming are significant. As global warming worsens, marine life is negatively impacted, significantly destroying marine life and causing additional issues.

Preventing Global Warming

Finding the proper solution is crucial now more than ever since global warming has become a serious issue and is being discussed globally at international forums and conferences. It is time that the age of industrialization to be controlled and continued in a sustainable manner. Everybody, from communities to governments, needs to work together to solve the issue of global warming. Controlling pollution, population growth, and the limiting exploitation of natural resources are a few factors to consider. Using public transportation or carpooling with others will be very helpful. Therefore, recycling should also be promoted to individuals.

There are clear signs that the increase in global warming will wipe out all life on the surface of the world. Global warming is the greatest threat to humanity and cannot be disregarded. Additionally, it is difficult to manage. By participating and responding, we can help lessen its effects.

Also Read: Essay on Diwali in English for Children and Students

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• ENVIRONMENT

What is global warming, explained

The planet is heating up—and fast.

Glaciers are melting , sea levels are rising, cloud forests are dying , and wildlife is scrambling to keep pace. It has become clear that humans have caused most of the past century's warming by releasing heat-trapping gases as we power our modern lives. Called greenhouse gases, their levels are higher now than at any time in the last 800,000 years .

We often call the result global warming, but it is causing a set of changes to the Earth's climate, or long-term weather patterns, that varies from place to place. While many people think of global warming and climate change as synonyms , scientists use “climate change” when describing the complex shifts now affecting our planet’s weather and climate systems—in part because some areas actually get cooler in the short term.

Climate change encompasses not only rising average temperatures but also extreme weather events , shifting wildlife populations and habitats, rising seas , and a range of other impacts. All of those changes are emerging as humans continue to add heat-trapping greenhouse gases to the atmosphere, changing the rhythms of climate that all living things have come to rely on.

What will we do—what can we do—to slow this human-caused warming? How will we cope with the changes we've already set into motion? While we struggle to figure it all out, the fate of the Earth as we know it—coasts, forests, farms, and snow-capped mountains—hangs in the balance.

Understanding the greenhouse effect

The "greenhouse effect" is the warming that happens when certain gases in Earth's atmosphere trap heat . These gases let in light but keep heat from escaping, like the glass walls of a greenhouse, hence the name.

Sunlight shines onto the Earth's surface, where the energy is absorbed and then radiate back into the atmosphere as heat. In the atmosphere, greenhouse gas molecules trap some of the heat, and the rest escapes into space. The more greenhouse gases concentrate in the atmosphere, the more heat gets locked up in the molecules.

Scientists have known about the greenhouse effect since 1824, when Joseph Fourier calculated that the Earth would be much colder if it had no atmosphere. This natural greenhouse effect is what keeps the Earth's climate livable. Without it, the Earth's surface would be an average of about 60 degrees Fahrenheit (33 degrees Celsius) cooler.

A polar bear stands sentinel on Rudolf Island in Russia’s Franz Josef Land archipelago, where the perennial ice is melting.

In 1895, the Swedish chemist Svante Arrhenius discovered that humans could enhance the greenhouse effect by making carbon dioxide , a greenhouse gas. He kicked off 100 years of climate research that has given us a sophisticated understanding of global warming.

Levels of greenhouse gases have gone up and down over the Earth's history, but they had been fairly constant for the past few thousand years. Global average temperatures had also stayed fairly constant over that time— until the past 150 years . Through the burning of fossil fuels and other activities that have emitted large amounts of greenhouse gases, particularly over the past few decades, humans are now enhancing the greenhouse effect and warming Earth significantly, and in ways that promise many effects , scientists warn.

Aren't temperature changes natural?

Human activity isn't the only factor that affects Earth's climate. Volcanic eruptions and variations in solar radiation from sunspots, solar wind, and the Earth's position relative to the sun also play a role. So do large-scale weather patterns such as El Niño .

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But climate models that scientists use to monitor Earth’s temperatures take those factors into account. Changes in solar radiation levels as well as minute particles suspended in the atmosphere from volcanic eruptions , for example, have contributed only about two percent to the recent warming effect. The balance comes from greenhouse gases and other human-caused factors, such as land use change .

The short timescale of this recent warming is singular as well. Volcanic eruptions , for example, emit particles that temporarily cool the Earth's surface. But their effect lasts just a few years. Events like El Niño also work on fairly short and predictable cycles. On the other hand, the types of global temperature fluctuations that have contributed to ice ages occur on a cycle of hundreds of thousands of years.

For thousands of years now, emissions of greenhouse gases to the atmosphere have been balanced out by greenhouse gases that are naturally absorbed. As a result, greenhouse gas concentrations and temperatures have been fairly stable, which has allowed human civilization to flourish within a consistent climate.

Greenland is covered with a vast amount of ice—but the ice is melting four times faster than thought, suggesting that Greenland may be approaching a dangerous tipping point, with implications for global sea-level rise.

Now, humans have increased the amount of carbon dioxide in the atmosphere by more than a third since the Industrial Revolution. Changes that have historically taken thousands of years are now happening over the course of decades .

Why does this matter?

The rapid rise in greenhouse gases is a problem because it’s changing the climate faster than some living things can adapt to. Also, a new and more unpredictable climate poses unique challenges to all life.

Historically, Earth's climate has regularly shifted between temperatures like those we see today and temperatures cold enough to cover much of North America and Europe with ice. The difference between average global temperatures today and during those ice ages is only about 9 degrees Fahrenheit (5 degrees Celsius), and the swings have tended to happen slowly, over hundreds of thousands of years.

But with concentrations of greenhouse gases rising, Earth's remaining ice sheets such as Greenland and Antarctica are starting to melt too . That extra water could raise sea levels significantly, and quickly. By 2050, sea levels are predicted to rise between one and 2.3 feet as glaciers melt.

As the mercury rises, the climate can change in unexpected ways. In addition to sea levels rising, weather can become more extreme . This means more intense major storms, more rain followed by longer and drier droughts—a challenge for growing crops—changes in the ranges in which plants and animals can live, and loss of water supplies that have historically come from glaciers.

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Responding to the Climate Threat: Essays on Humanity’s Greatest Challenge

A new book co-authored by MIT Joint Program Founding Co-Director Emeritus Henry Jacoby

From the Back Cover

This book demonstrates how robust and evolving science can be relevant to public discourse about climate policy. Fighting climate change is the ultimate societal challenge, and the difficulty is not just in the wrenching adjustments required to cut greenhouse emissions and to respond to change already under way. A second and equally important difficulty is ensuring widespread public understanding of the natural and social science. This understanding is essential for an effective risk management strategy at a planetary scale. The scientific, economic, and policy aspects of climate change are already a challenge to communicate, without factoring in the distractions and deflections from organized programs of misinformation and denial. 

Here, four scholars, each with decades of research on the climate threat, take on the task of explaining our current understanding of the climate threat and what can be done about it, in lay language―importantly, without losing critical  aspects of the natural and social science. In a series of essays, published during the 2020 presidential election, the COVID pandemic, and through the fall of 2021, they explain the essential components of the challenge, countering the forces of distrust of the science and opposition to a vigorous national response.  

Each of the essays provides an opportunity to learn about a particular aspect of climate science and policy within the complex context of current events. The overall volume is more than the sum of its individual articles. Proceeding each essay is an explanation of the context in which it was written, followed by observation of what has happened since its first publication. In addition to its discussion of topical issues in modern climate science, the book also explores science communication to a broad audience. Its authors are not only scientists – they are also teachers, using current events to teach when people are listening. For preserving Earth’s planetary life support system, science and teaching are essential. Advancing both is an unending task.

About the Authors

Gary Yohe is the Huffington Foundation Professor of Economics and Environmental Studies, Emeritus, at Wesleyan University in Connecticut. He served as convening lead author for multiple chapters and the Synthesis Report for the IPCC from 1990 through 2014 and was vice-chair of the Third U.S. National Climate Assessment.

Henry Jacoby is the William F. Pounds Professor of Management, Emeritus, in the MIT Sloan School of Management and former co-director of the MIT Joint Program on the Science and Policy of Global Change, which is focused on the integration of the natural and social sciences and policy analysis in application to the threat of global climate change.

Richard Richels directed climate change research at the Electric Power Research Institute (EPRI). He served as lead author for multiple chapters of the IPCC in the areas of mitigation, impacts and adaptation from 1992 through 2014. He also served on the National Assessment Synthesis Team for the first U.S. National Climate Assessment.

Ben Santer is a climate scientist and John D. and Catherine T. MacArthur Fellow. He contributed to all six IPCC reports. He was the lead author of Chapter 8 of the 1995 IPCC report which concluded that “the balance of evidence suggests a discernible human influence on global climate”. He is currently a Visiting Researcher at UCLA’s Joint Institute for Regional Earth System Science & Engineering.

Access the Book

View the book on the publisher's website  here .

Order the book from Amazon  here . 

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• Biology Article
• Essay on Global Warming

Essay On Global Warming

Essay on global warming is an important topic for students to understand. The essay brings to light the plight of the environment and the repercussion of anthropogenic activities. Continue reading to discover tips and tricks for writing an engaging and interesting essay on global warming.

Essay On Global Warming in 300 Words

Global warming is a phenomenon where the earth’s average temperature rises due to increased amounts of greenhouse gases. Greenhouse gases such as carbon dioxide, methane and ozone trap the incoming radiation from the sun. This effect creates a natural “blanket”, which prevents the heat from escaping back into the atmosphere. This effect is called the greenhouse effect.

Contrary to popular belief, greenhouse gases are not inherently bad. In fact, the greenhouse effect is quite important for life on earth. Without this effect, the sun’s radiation would be reflected back into the atmosphere, freezing the surface and making life impossible. However, when greenhouse gases in excess amounts get trapped, serious repercussions begin to appear. The polar ice caps begin to melt, leading to a rise in sea levels. Furthermore, the greenhouse effect is accelerated when polar ice caps and sea ice melts. This is due to the fact the ice reflects 50% to 70% of the sun’s rays back into space, but without ice, the solar radiation gets absorbed. Seawater reflects only 6% of the sun’s radiation back into space. What’s more frightening is the fact that the poles contain large amounts of carbon dioxide trapped within the ice. If this ice melts, it will significantly contribute to global warming. 

A related scenario when this phenomenon goes out of control is the runaway-greenhouse effect. This scenario is essentially similar to an apocalypse, but it is all too real. Though this has never happened in the earth’s entire history, it is speculated to have occurred on Venus. Millions of years ago, Venus was thought to have an atmosphere similar to that of the earth. But due to the runaway greenhouse effect, surface temperatures around the planet began rising. 

If this occurs on the earth, the runaway greenhouse effect will lead to many unpleasant scenarios – temperatures will rise hot enough for oceans to evaporate. Once the oceans evaporate, the rocks will start to sublimate under heat. In order to prevent such a scenario, proper measures have to be taken to stop climate change.

More to Read: Learn How Greenhouse Effect works

Tips To Writing the Perfect Essay

Consider adopting the following strategies when writing an essay. These are proven methods of securing more marks in an exam or assignment.

• Begin the essay with an introductory paragraph detailing the history or origin of the given topic.
• Try to reduce the use of jargons. Use sparingly if the topic requires it.
• Ensure that the content is presented in bulleted points wherever appropriate.
• Insert and highlight factual data, such as dates, names and places.
• Remember to break up the content into smaller paragraphs. 100-120 words per paragraph should suffice.
• Always conclude the essay with a closing paragraph.

Explore more essays on biology or other related fields at BYJU’S.

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How You Can Stop Global Warming

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Rising sea levels. Raging storms. Searing heat. Ferocious fires. Severe drought. Punishing floods. The effects of climate change are already threatening our health, our communities, our economy, our security, and our children’s future.

What can you do? A whole lot, as it turns out. Americans, on average, produce 21 tons of carbon a year, about four times the global average. Personal action is, of course, no substitute for meaningful government policies. We still must limit carbon pollution and aggressively move away from dirty fossil fuels toward cleaner power.

But it’s important to remember the equally vital contributions that can be made by private citizens—which is to say, by you. “Change only happens when individuals take action,” says clean energy advocate Aliya Haq. “There’s no other way, if it doesn’t start with people.”

Here are a dozen easy, effective ways each one of us can make a difference.

1. Speak up!

What’s the single biggest way you can make an impact on global climate change? “Talk to your friends and family, and make sure your representatives are making good decisions,” Haq says. By voicing your concerns—via social media or, better yet, directly to your elected officials —you send a message that you care about the warming world. Encourage Congress to enact new laws that limit carbon emissions and require polluters to pay for the emissions they produce. “The main reason elected officials do anything difficult is because their constituents make them,” Haq says. You can help protect public lands, stop offshore drilling, and more here .

2. Power your home with renewable energy.

Choose a utility company that generates at least half its power from wind or solar and has been certified by Green-e Energy , an organization that vets renewable energy options. If that isn’t possible for you, take a look at your electric bill; many utilities now list other ways to support renewable sources on their monthly statements and websites.

3. Weatherize, weatherize, weatherize.

“Building heating and cooling are among the biggest uses of energy,” Haq says. Indeed, heating and air-conditioning account for almost half of home energy use. You can make your space more energy efficient by sealing drafts and ensuring it’s adequately insulated. You can also claim federal tax credits for many energy efficiency home improvements. To help you figure out where to start, you could also get a home energy audit, which some utilities offer free of charge. (Alternatively, you can hire a professional to come to your home and perform one; the Inflation Reduction Act offers a partial tax credit for this.) The EPA’s Home Energy Yardstick gives you a simple assessment of your home’s annual energy use compared with similar homes.

4. Invest in energy-efficient appliances.

Since they were first implemented nationally in 1987, efficiency standards for dozens of appliances and products have kept 2.3 billion tons of carbon dioxide out of the air. That’s about the same amount as the annual carbon pollution coughed up by nearly 440 million cars. “Energy efficiency is the lowest-cost way to reduce emissions,” Haq says. When shopping for refrigerators, washing machines, heat pump water heaters , and other appliances, look for the Energy Star label. It will tell you which are the most efficient. (There may also be rebates to earn from your purchase of Energy Star–certified products.)

And when you’re ready to swap out your old machines, don’t just put them on the curb: Recycling an old refrigerator through the EPA’s Responsible Appliance Disposal Program can prevent an additional 10,000 pounds of carbon pollution because the global-warming pollutants in the refrigerants and foam would be properly captured rather than vented to the air.

5. Reduce water waste.

Saving water reduces carbon pollution, too. That's because it takes a lot of energy to pump, heat, and treat your water. So take shorter showers, turn off the tap while brushing your teeth, and switch to WaterSense -labeled fixtures and appliances. The EPA estimates that if just one out of every 100 American homes were retrofitted with water-efficient fixtures, about 100 million kilowatt-hours of electricity per year would be saved—avoiding 80,000 tons of global warming pollution .

6. Actually eat the food you buy—and compost what you can’t.

Approximately 10 percent of U.S. energy use goes into growing, processing, packaging, and shipping food—about 40 percent of which winds up in the landfill. “If you’re wasting less food, you’re likely cutting down on energy consumption,” Haq says. As for the scraps you can’t eat or the leftovers you don’t get to, collect them in a compost bin instead of sending them to the landfill where they release methane. Recycling food and other organic waste into compost provides a range of environmental benefits, including improving soil health, reducing greenhouse gas emissions, recycling nutrients, and mitigating the impact of droughts.

7. Buy better bulbs.

LED light bulbs use one-sixth the amount of energy to deliver the same amount of light as conventional incandescents and last at least 10 times longer. They’re also cheaper in the long run: A 10-watt LED that replaces your traditional 60-watt bulb will save you $125 over the light bulb’s life. And because the average American home has around 40 to 50 light bulbs, this is a simple swap that will reap huge rewards. If every household in the United States replaced just one incandescent with an Energy Star–labeled LED, we would prevent seven billion pounds of carbon pollution per year. That’s equivalent to the emissions of about 648,000 cars.

8. Pull the plug(s).

Taken together, the outlets in your home are likely powering about 65 devices—an average load for a home in the United States. Audio and video devices, cordless vacuums and power tools, and other electronics use energy even when they're not charging. This "idle load" across all U.S. households adds up to the output of 50 large power plants in the country . So don't leave fully charged devices plugged into your home's outlets, unplug rarely used devices or plug them into power strips and timers, and adjust your computers and monitors to automatically power down to the lowest power mode when not in use.

9. Drive a fuel-efficient vehicle.

Gas-smart cars, such as hybrids and fully electric vehicles, save fuel and money . And once all cars and light trucks meet 2025’s clean car standards, which means averaging 54.5 miles per gallon, they’ll be a mainstay. For good reason: Relative to a national fleet of vehicles that averaged only 28.3 miles per gallon in 2011, Americans will spend $80 billion less at the pump each year and cut their automotive emissions by half. Before you buy a new set of wheels, compare fuel-economy performance here .

10. Maintain your ride.

If all Americans kept their tires properly inflated, we could save 1.2 billion gallons of gas each year. A simple tune-up can boost miles per gallon anywhere from 4 percent to 40 percent, and a new air filter can get you a 10 percent boost. Also, remove unnecessary accessories from your car roof. Roof racks and clamshell storage containers can reduce fuel efficiency by as much as 5 percent.

11. Rethink planes, trains, and automobiles.

Choosing to live in walkable smart-growth cities and towns with quality public transportation leads to less driving, less money spent on fuel, and less pollution in the air . Less frequent flying can make a big difference, too. “Air transport is a major source of climate pollution,” Haq says. “If you can take a train instead, do that.” If you must fly, consider purchasing carbon offsets to counterbalance the hefty carbon pollution associated with flying. But not all carbon offset companies are alike. Do your homework to find the best supplier.

12. Reduce, reuse, and recycle.

In the United States, the average person generates 4.5 pounds of trash every day. Fortunately, not all the items we discard end up in landfills; we recycle or compost more than one-third of our trash. In 2014 this saved carbon emissions equivalent to the yearly output of 38 million passenger cars . But we could be doing so much more. “ Reduce should always be the number-one priority,” says NRDC senior resource specialist Darby Hoover . And to reap the environmental benefits of “recyclable” goods, you must recycle according to the rules of your municipality, since systems vary widely by location . Search your municipality’s sanitation department (or equivalent) webpage to learn exactly what you can place in the recycling bin, as counties and cities often differ in what they accept.

This story was originally published on April 20, 2022 and has been updated with new information and links.

This NRDC.org story is available for online republication by news media outlets or nonprofits under these conditions: The writer(s) must be credited with a byline; you must note prominently that the story was originally published by NRDC.org and link to the original; the story cannot be edited (beyond simple things such as grammar); you can’t resell the story in any form or grant republishing rights to other outlets; you can’t republish our material wholesale or automatically—you need to select stories individually; you can’t republish the photos or graphics on our site without specific permission; you should drop us a note to let us know when you’ve used one of our stories.

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1. Spread the word

Encourage your friends, family and co-workers to reduce their carbon pollution. Join a global movement like  Count Us In, which aims to inspire 1 billion people to take practical steps and challenge their leaders to act more boldly on climate. Organizers of the platform say that if 1 billion people took action, they could reduce as much as 20 per cent of global carbon emissions. Or you could sign up to the UN’s  #ActNow campaign on climate change and sustainability and add your voice to this critical global debate.

2. Keep up the political pressure

Lobby local politicians and businesses to support efforts to cut emissions and reduce carbon pollution.  #ActNow Speak Up  has sections on political pressure and corporate action - and Count Us In also has  some handy tips  for how to do this. Pick an environmental issue you care about, decide on a specific request for change and then try to arrange a meeting with your local representative. It might seem intimidating but your voice deserves to be heard. If humanity is to succeed in tackling the climate emergency, politicians must be part of the solution. It’s up to all of us to keep up with the pressure. 

3. Transform your transport

Transport accounts for around a quarter of all greenhouse gas emissions and across the world, many governments are implementing policies to decarbonize travel. You can get a head start: leave your car at home and walk or cycle whenever possible. If the distances are too great, choose public transport, preferably electric options. If you must drive, offer to carpool with others so that fewer cars are on the road. Get ahead of the curve and buy an electric car. Reduce the number of long-haul flights you take. 

4. Rein in your power use

If you can, switch to a zero-carbon or renewable energy provider. Install solar panels on your roof. Be more efficient: turn your heating down a degree or two, if possible. Switch off appliances and lights when you are not using them and better yet buy the most efficient products in the first place (hint: this will save you money!). Insulate your loft or roof: you’ll be warmer in the winter, cooler in the summer and save some money too. 

5. Tweak your diet

Eat more plant-based meals – your body and the planet will thank you. Today, around 60 per cent of the world’s agricultural land is used for livestock grazing and people in many countries are consuming more animal-sourced food than is healthy. Plant-rich diets can help reduce chronic illnesses, such as heart disease, stroke, diabetes and cancer.

The climate emergency demands action from all of us. We need to get to net zero greenhouse gas emissions by 2050 and everyone has a role to play.

6. Shop local and buy sustainable

To reduce your food’s carbon footprint, buy local and seasonal foods. You’ll be helping small businesses and farms in your area and reducing fossil fuel emissions associated with transport and cold chain storage. Sustainable agriculture uses up to 56 per cent less energy, creates 64 per cent fewer emissions and allows for greater levels of biodiversity than conventional farming. Go one step further and try growing your own fruit, vegetables and herbs. You can plant them in a garden, on a balcony or even on a window sill. Set up a community garden in your neighbourhood to get others involved. 

7. Don’t waste food

One-third of all food produced is either lost or wasted. According to UNEP’s  Food Waste Index Report 2021 , people globally waste 1 billion tonnes of food each year, which accounts for around 8-10 per cent of global greenhouse gas emissions. Avoid waste by only buying what you need. Take advantage of every edible part of the foods you purchase. Measure portion sizes of rice and other staples before cooking them, store food correctly (use your freezer if you have one), be creative with leftovers, share extras with your friends and neighbours and contribute to a local food-sharing scheme. Make compost out of inedible remnants and use it to fertilize your garden. Composting is one of the best options for managing organic waste while also reducing environmental impacts.

8. Dress (climate) smart

The fashion industry accounts for 8-10 per cent of global carbon emissions – more than all international flights and maritime shipping combined – and ‘fast fashion’ has created a throwaway culture that sees clothes quickly end up in landfills. But we can change this. Buy fewer new clothes and wear them longer. Seek out sustainable labels and use rental services for special occasions rather than buying new items that will only be worn once. Recycle pre-loved clothes and repair when necessary.

9. Plant trees  

Every year approximately 12 million hectares of forest are destroyed and this deforestation, together with agriculture and other land use changes, is responsible for roughly 25 per cent of global greenhouse gas emissions. We can all play a part in reversing this trend by planting trees, either individually or as part of a collective. For example, the Plant-for-the-Planet initiative allows people to sponsor tree-planting around the world.

Check out this UNEP guide to see what else you can do as part of the UN Decade on Ecosystem Restoration , a global drive to halt the degradation of land and oceans, protect biodiversity, and rebuild ecosystems. 

10. Focus on planet-friendly investments

Individuals can also spur change through their savings and investments by choosing financial institutions that do not invest in carbon-polluting industries. #ActNow Speak Up  has a section on money and so does  Count Us In . This sends a clear signal to the market and already many financial institutions are offering more ethical investments, allowing you to use your money to support causes you believe in and avoid those you don’t. You can ask your financial institution about their responsible banking policies and find out how they rank in independent research. 

UNEP is at the front in support of the Paris Agreement goal of keeping the global temperature rise well below 2°C, and aiming - to be safe - for 1.5°C, compared to pre-industrial levels. To do this, UNEP has developed a Six-Sector Solution . The Six Sector Solution is a roadmap to reducing emissions across sectors in line with the Paris Agreement commitments and in pursuit of climate stability. The six sectors identified are Energy; Industry; Agriculture & Food; Forests & Land Use; Transport; and Buildings & Cities.

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Home / Everyday actions / 6 Claims Made by Climate Change Skeptics—and How to Respond

6 Claims Made by Climate Change Skeptics—and How to Respond

Filed Under: Everyday actions   |  Tagged: Climate Last updated November 1, 2022

It’s hard to believe, but apparently more than a few climate change deniers still roam our ever-heating planet. According to a recent study in the esteemed science journal PLOS , people systematically understate their disbelief in human-caused climate change when answering surveys, so skepticism is more prevalent than many of us realize.

Given the urgency of the climate crisis, it’s crucial that we all do our part to educate any doubters we might encounter. That’s why the Rainforest Alliance has compiled six arguments commonly made by climate change deniers, along with science-backed responses you can deploy to convince them of the truth: that climate change is real, accelerating, and that we need to take bold action ASAP.  

1. Climate change denier claim: “This is the coldest winter we’ve had in years! So much for global warming.”

There’s a difference between climate and weather: Weather fluctuates day in, day out, whereas climate refers to long term trends—and the overall trend is clearly and indisputably a warming one. While the impacts of climate change have only just begun to hit the Global North, farmers in the tropics have been contending with impacts—from droughts to floods to a proliferation of crop-destroying pests—for years. That’s why the Rainforest Alliance works with farmers to take a climate-smart approach . That means first assessing a farm’s particular climate risks, taking the crop and local ecosystem into account, then finding the right combination of tools to manage the farms climate challenges. That’s what makes climate-smart agriculture “smart.”

Together, we’re building a future where people and nature thrive. Sign up today and join our movement.

2. “Climate change is natural and normal—it’s happened at other points in history.”

It’s true that there have been periods of global warming and cooling—also related to spikes and lulls in greenhouse gases—during the Earth’s long history. But those historic increases in CO 2 should be a warning to us: They led to serious environmental disruptions, including mass extinctions. Today, humans are emitting greenhouse gases at a far higher rate than any previous increase in history .  (Before you collapse into a puddle of despair, however, find out about our work to promote natural climate solutions , like community forestry and regenerative agriculture.)

3. “There’s no consensus among scientists that climate change is real.”

Wrong. There is nearly 100 percent agreement among scientists. Moreover, the UN’s Intergovernmental Panel on Climate Change (IPCC) says that global warming is accelerating, and will reach 1.C above pre-Industrial levels around 2030 —a full decade earlier than previously forecast .  

4. “Plants and animals can adapt.”

Wrong again. Because human-caused climate change is happening so rapidly, species simply don’t have time to adapt . Frogs tell the story best: With their semi-permeable skin, unprotected eggs, and reliance on external temperatures to regulate their own, they are often among the first species to die off when ecosystems tip out of balance—and they’re dying off in droves. The Rainforest Alliance chose a frog as its mascot more than 30 years ago precisely because it’s a bio-indicator: A healthy frog population signals a healthy ecosystem, which is what we’ve been working to promote—along with thriving communities—since 1987.

5. “Climate change is good for us.”

It’s hard to even know where to begin to address this statement by climate change deniers, especially when you think about the human cost of a warming planet. The evidence points to a clear link between climate change and a surge in modern slavery : When crop failures, drought, floods, or fires wipe out livelihoods and homes, people migrate in the hopes of improving their lot—but can find themselves vulnerable to human trafficking and forced labor and other human rights abuses. And the overall economic cost is staggering: The global economy could lose $23 trillion to climate change by 2050 .

6. “OK, maybe climate change is real, but there’s nothing to be done—it’s too late.”

It’s true that we don’t have a moment to waste, but it’s not too late. If governments, business, and individuals begin taking drastic action now, we can keep warming within the 1.5C target set by the Paris Agreement. What can you do to make sure that happens? A lot. Here are actions you can take —both to make your daily life more sustainable and to push governments and companies to act—to secure a better future.  

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The global warming that’s causing our climate crisis is already having dire consequences.

In just the past few decades:

• Rising temperatures have worsened extreme weather events .
• Chunks of ice in the Antarctic have broken apart .
• Wildfire seasons are months longer .
• Coral reefs have been bleached of their colors .
• Mosquitoes are expanding their territory, able to spread disease .

What’s causing this climate crisis?

It’s mainly us.

Humans are the main cause of climate change — we burn fossil fuels and chop down forests, causing average temperatures to rise worldwide. That global warming trend is increasingly disrupting our climate — the average weather over many years.

Earth has already warmed by about 1 degree Celsius, or 1.8 degrees Fahrenheit, since the 19th century, before industry started to boom.

While we experience the effects , we’re on our way toward 1.5 degrees C (2.7 F) by as early as 2030.

7 facts about climate change

Why a half-degree more is such a big deal

A warmer world — even by a half-degree Celsius — has more evaporation, leading to more water in the atmosphere. Such changing conditions put our agriculture, health, water supply and more at risk.

Picture a North Carolina cotton farm that’s been around since 1960, with global average temperatures rising by roughly half a degree since it grew its first crop.

The increased evaporation and additional moisture to the atmosphere has led to 30% more intense rain during heavy downpours in that part of the U.S.

Then a hurricane like 2018’s Florence — already strengthened by warmer oceans and higher seas — dumps this excess rainfall on the farm. The crops get more flooded and damaged than they did half a century ago.

It's how you go from half-degree of warming to economic hardship.

Are record-breaking hurricanes our new normal?

There’s still time to act

Whether it’s a shift of 1.5 degrees or 2 degrees, these warming levels aren’t magic thresholds. Every rise in warming is worse for the planet than the last.

But they're not inevitable.

It's not too late to slow the pace of climate change and avert the worst impacts of the climate crisis — as long as we act today. With your help, we can attack this challenge.

Donate now to have triple the impact in the climate fight

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Make a monthly donation this spring and you can double your impact.

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Why People Aren’t Motivated to Address Climate Change

• Art Markman

Our brains have trouble planning for the distant future.

Whether it’s an unfamiliar dog growling outside your front door or a bus bearing down the street toward you, we are often motivated to avoid threats. Why is climate change so different? The recent United Nations report detailed that we will face serious consequences in the next 25 years if the nations of the world do not drastically act to reduce climate change now. There are many reasons that it’s difficult to motivate people to address climate change. It represents a trade-off between short-term and long-term benefits; it’s a nonlinear problem; the effects of climate change are distant from most people; and the future is always more uncertain than the present. However, there are ways to motivate yourself about the dire consequences: Bring the future mentally closer to yourself, confront the uncertainty head-on, and initiate a serious discussion about values among your peers.

People are often highly motivated to avoid threats. If you are walking down a dark, isolated city street, you are vigilant for unexpected sights and sounds and probably pick up the pace to get back to a populated area as quickly as possible. If you step into the street and see a bus bearing down on you, you jump back. If a large unfamiliar dog is growling outside your front door, you stay inside.

• Art Markman , PhD, is the Annabel Irion Worsham Centennial Professor of Psychology and Marketing at the University of Texas at Austin and founding director of the program in the  Human Dimensions of Organizations . He has written over 150 scholarly papers on topics including reasoning, decision-making, and motivation. His most recent book is Bring Your Brain to Work: Using Cognitive Science to Get a Job, Do it Well, and Advance Your Career (HBR Press).

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What can we do to slow or stop global warming?

There is no one-size-fits-all approach to stopping or slowing global warming, and each individual, business, municipal, state, tribal, and federal entity must weigh their options in light of their own unique set of circumstances.  Experts say  it is likely many strategies working together will be needed. Generally speaking, here are some examples of mitigation strategies we can use to slow or stop the human-caused global warming ( learn more ):

• Where possible, we can switch to renewable sources of energy (such as solar and wind energy) to power our homes and buildings, thus emitting far less heat-trapping gases into the atmosphere.
• Where feasible, we can drive electric vehicles instead of those that burn fossil fuels; or we can use mass transit instead of driving our own cars.
• Where affordable, we can conserve energy by better insulating our homes and buildings, and by replacing old, failing appliances with more energy-efficient models.
• Where practicable, we can counterbalance our annual carbon dioxide emissions by investing in commercial services that draw down an equal amount of carbon out of the atmosphere, such as through planting trees or  carbon capture and storage  techniques.
• Where practical, we can support more local businesses that use and promote sustainable, climate-smart practices such as those listed above.
• We can consider placing an upper limit on the amount of carbon dioxide we will allow ourselves to emit into the atmosphere within a given timeframe.

Note that NOAA doesn’t advocate for or against particular climate policies. Instead, NOAA’s role is to provide data and scientific information about climate, including how it has changed and is likely to change in the future depending on different climate policies or actions society may or may not take. More guidance on courses of action can be found in the National Academy of Sciences' 2010 report, titled  Informing an Effective Response to Climate Change . Also learn more  here,   here,  and  here .

Thanks to low friction between train wheels and tracks, and level train tracks with gradual turns, trains have high energy efficiency. Photo from National Park Service Amtrak Trails and Rails .

Stabilizing global temperature near its current level requires eliminating all emissions of heat-trapping gases or, equivalently, achieving a carbon-neutral society in which people remove as much carbon from the atmosphere as they emit. Achieving this goal will require substantial societal changes in energy technologies and infrastructure that go beyond the collective actions of individuals and households to reduce emissions.

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Why apocalyptic claims about climate change are wrong.

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Climate scientists are speaking out against grossly exaggerated claims about global warming.

Environmental journalists and advocates have in recent weeks made a number of apocalyptic predictions about the impact of climate change. Bill McKibben suggested climate-driven fires in Australia had made koalas “functionally extinct.” Extinction Rebellion said “Billions will die” and “Life on Earth is dying.” Vice claimed the “collapse of civilization may have already begun.” 

Few have underscored the threat more than student climate activist Greta Thunberg and Green New Deal sponsor Rep. Alexandria Ocasio-Cortez. The latter said , “The world is going to end in 12 years if we don't address climate change.” Says Thunberg in her new book, “Around 2030 we will be in a position to set off an irreversible chain reaction beyond human control that will lead to the end of our civilization as we know it.” 

Sometimes, scientists themselves make apocalyptic claims. “It’s difficult to see how we could accommodate a billion people or even half of that,” if Earth warms four degrees, said one earlier this year. “The potential for multi-breadbasket failure is increasing,” said another. If sea levels rise as much as the Intergovernmental Panel on Climate Change predicts, another scientist said , “It will be an unmanageable problem.” 

Apocalyptic statements like these have real-world impacts. In September, a group of British psychologists said children are increasingly suffering from anxiety from the frightening discourse around climate change. In October, an activist with Extinction Rebellion (”XR”) — an environmental group founded in 2018 to commit civil disobedience to draw awareness to the threat its founders and supporters say climate change poses to human existence — and a videographer, were kicked and beaten in a London Tube station by angry commuters. And last week, an XR co-founder said a genocide like the Holocaust was “happening again, on a far greater scale, and in plain sight” from climate change.

Climate change is an issue I care passionately about and have dedicated a significant portion of my life to addressing. I have been politically active on the issue for over 20 years and have researched and written about it for 17 years. Over the last four years, my organization, Environmental Progress, has worked with some of the world’s leading climate scientists to prevent carbon emissions from rising. So far, we’ve helped prevent emissions increasing the equivalent of adding 24 million cars to the road. 

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I also care about getting the facts and science right and have in recent months corrected inaccurate and apocalyptic news media coverage of fires in the Amazon and fires in California , both of which have been improperly presented as resulting primarily from climate change. 

Journalists and activists alike have an obligation to describe environmental problems honestly and accurately, even if they fear doing so will reduce their news value or salience with the public. There is good evidence that the catastrophist framing of climate change is self-defeating because it alienates and polarizes many people. And exaggerating climate change risks distracting us from other important issues including ones we might have more near-term control over.

I feel the need to say this up-front because I want the issues I’m about to raise to be taken seriously and not dismissed by those who label as “climate deniers” or “climate delayers” anyone who pushes back against exaggeration.

With that out of the way, let’s look whether the science supports what’s being said.

First, no credible scientific body has ever said climate change threatens the collapse of civilization much less the extinction of the human species. “‘Our children are going to die in the next 10 to 20 years.’ What’s the scientific basis for these claims?” BBC’s Andrew Neil asked a visibly uncomfortable XR spokesperson last month.

“These claims have been disputed, admittedly,” she said. “There are some scientists who are agreeing and some who are saying it’s not true. But the overall issue is that these deaths are going to happen.”

“But most scientists don’t agree with this,” said Neil. “I looked through IPCC reports and see no reference to billions of people going to die, or children in 20 years. How would they die?”

“Mass migration around the world already taking place due to prolonged drought in countries, particularly in South Asia. There are wildfires in Indonesia, the Amazon rainforest, Siberia, the Arctic,” she said.

But in saying so, the XR spokesperson had grossly misrepresented the science. “There is robust evidence of disasters displacing people worldwide,” notes IPCC, “but limited evidence that climate change or sea-level rise is the direct cause” 

What about “mass migration”? “The majority of resultant population movements tend to occur within the borders of affected countries," says IPCC.

It’s not like climate doesn’t matter. It’s that climate change is outweighed by other factors. Earlier this year, researchers found that climate “has affected organized armed conflict within countries. However, other drivers, such as low socioeconomic development and low capabilities of the state, are judged to be substantially more influential.”

Last January, after climate scientists criticized Rep. Ocasio-Cortez for saying the world would end in 12 years, her spokesperson said "We can quibble about the phraseology, whether it's existential or cataclysmic.” He added, “We're seeing lots of [climate change-related] problems that are already impacting lives."

That last part may be true, but it’s also true that economic development has made us less vulnerable, which is why there was a 99.7% decline in the death toll from natural disasters since its peak in 1931. 

In 1931, 3.7 million people died from natural disasters. In 2018, just 11,000 did.  And that decline occurred over a period when the global population quadrupled .

What about sea level rise? IPCC estimates sea level could rise two feet (0.6 meters) by 2100. Does that sound apocalyptic or even “unmanageable”?

Consider that one-third of the Netherlands is below sea level, and some areas are seven meters below sea level. You might object that Netherlands is rich while Bangladesh is poor. But the Netherlands adapted to living below sea level 400 years ago. Technology has improved a bit since then.

What about claims of crop failure, famine, and mass death? That’s science fiction, not science. Humans today produce enough food for 10 billion people, or 25% more than we need, and scientific bodies predict increases in that share, not declines. 

The United Nations Food and Agriculture Organization (FAO) forecasts crop yields increasing 30% by 2050. And the poorest parts of the world, like sub-Saharan Africa, are expected to see increases of 80 to 90%.

Nobody is suggesting climate change won’t negatively impact crop yields. It could. But such declines should be put in perspective. Wheat yields increased 100 to 300% around the world since the 1960s, while a study of 30 models found that yields would decline by 6% for every one degree Celsius increase in temperature.

Rates of future yield growth depend far more on whether poor nations get access to tractors, irrigation, and fertilizer than on climate change, says FAO.

All of this helps explain why IPCC anticipates climate change will have a modest impact on economic growth. By 2100, IPCC projects the global economy will be 300 to 500% larger than it is today. Both IPCC and the Nobel-winning Yale economist, William Nordhaus, predict that warming of 2.5°C and 4°C would reduce gross domestic product (GDP) by 2% and 5% over that same period.

Does this mean we shouldn’t worry about climate change? Not at all. 

One of the reasons I work on climate change is because I worry about the impact it could have on endangered species. Climate change may threaten one million species globally and half of all mammals, reptiles, and amphibians in diverse places like the Albertine Rift in central Africa, home to the endangered mountain gorilla.

But it’s not the case that “we’re putting our own survival in danger” through extinctions, as Elizabeth Kolbert claimed in her book, Sixth Extinction . As tragic as animal extinctions are, they do not threaten human civilization. If we want to save endangered species, we need to do so because we care about wildlife for spiritual, ethical, or aesthetic reasons, not survival ones.  

And exaggerating the risk, and suggesting climate change is more important than things like habitat destruction, are counterproductive.

For example, Australia’s fires are not driving koalas extinct, as Bill McKibben suggested. The main scientific body that tracks the species, the International Union for the Conservation of Nature, or IUCN, labels the koala “vulnerable,” which is one level less threatened than “endangered,” two levels less than “critically endangered,” and three less than “extinct” in the wild. 

Should we worry about koalas? Absolutely! They are amazing animals and their numbers have declined to around 300,000. But they face far bigger threats such as the destruction of habitat, disease, bushfires, and invasive species. 

Think of it this way. The climate could change dramatically — and we could still save koalas. Conversely, the climate could change only modestly — and koalas could still go extinct. 

The monomaniacal focus on climate distracts our attention from other threats to koalas and opportunities for protecting them, like protecting and expanding their habitat.

As for fire, one of Australia’s leading scientists on the issue says , “Bushfire losses can be explained by the increasing exposure of dwellings to fire-prone bushlands. No other influences need be invoked. So even if climate change had played some small role in modulating recent bushfires, and we cannot rule this out, any such effects on risk to property are clearly swamped by the changes in exposure.”

Nor are the fires solely due to drought, which is common in Australia, and exceptional this year. “Climate change is playing its role here,” said Richard Thornton of the Bushfire and Natural Hazards Cooperative Research Centre in Australia, “but it's not the cause of these fires."

The same is true for fires in the United States. In 2017, scientists modeled 37 different regions and found “humans may not only influence fire regimes but their presence can actually override, or swamp out, the effects of climate.” Of the 10 variables that influence fire, “none were as significant… as the anthropogenic variables,” such as building homes near, and managing fires and wood fuel growth within, forests.

Climate scientists are starting to push back against exaggerations by activists, journalists, and other scientists. 

“While many species are threatened with extinction,” said Stanford’s Ken Caldeira, “climate change does not threaten human extinction... I would not like to see us motivating people to do the right thing by making them believe something that is false.”

I asked the Australian climate scientist Tom Wigley what he thought of the claim that climate change threatens civilization. “It really does bother me because it’s wrong,” he said. “All these young people have been misinformed. And partly it’s Greta Thunberg’s fault. Not deliberately. But she’s wrong.”

But don’t scientists and activists need to exaggerate in order to get the public’s attention?

“I’m reminded of what [late Stanford University climate scientist] Steve Schneider used to say,” Wigley replied. “He used to say that as a scientist, we shouldn’t really be concerned about the way we slant things in communicating with people out on the street who might need a little push in a certain direction to realize that this is a serious problem. Steve didn’t have any qualms about speaking in that biased way. I don’t quite agree with that.”

Wigley started working on climate science full-time in 1975 and created one of the first climate models (MAGICC) in 1987. It remains one of the main climate models in use today.

“When I talk to the general public,” he said, “I point out some of the things that might make projections of warming less and the things that might make them more. I always try to present both sides.”

Part of what bothers me about the apocalyptic rhetoric by climate activists is that it is often accompanied by demands that poor nations be denied the cheap sources of energy they need to develop. I have found that many scientists share my concerns.

“If you want to minimize carbon dioxide in the atmosphere in 2070  you might want to accelerate the burning of coal in India today,” MIT climate scientist Kerry Emanuel said. 

“It doesn’t sound like it makes sense. Coal is terrible for carbon. But it’s by burning a lot of coal that they make themselves wealthier, and by making themselves wealthier they have fewer children, and you don’t have as many people burning carbon, you might be better off in 2070.” 

Emanuel and Wigley say the extreme rhetoric is making political agreement on climate change harder. 

“You’ve got to come up with some kind of middle ground where you do reasonable things to mitigate the risk and try at the same time to lift people out of poverty and make them more resilient,” said Emanuel. “We shouldn’t be forced to choose between lifting people out of poverty and doing something for the climate.”

Happily, there is a plenty of middle ground between climate apocalypse and climate denial.

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Arguments Supporting the Reality of Global Warming

Counterarguments and rebuttal, consequences of global warming, list of resources.

• Scientific Studies and Reports: Intergovernmental Panel on Climate Change (IPCC) , Nature , Science , NASA
• Climate Organizations: Climate Central , World Wildlife Fund (WWF) Climate , Climate Action Network Canada
• Academic Journals: JSTOR , ScienceDirect , Taylor & Francis Online
• News Outlets: The New York Times - Climate , BBC Environment , The Guardian - Climate Change
• Books: "The Sixth Extinction" by Elizabeth Kolbert, "This Changes Everything" by Naomi Klein, "The Uninhabitable Earth" by David Wallace-Wells

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Climate Change: Evidence and Causes: Update 2020 (2020)

Chapter: conclusion, c onclusion.

This document explains that there are well-understood physical mechanisms by which changes in the amounts of greenhouse gases cause climate changes. It discusses the evidence that the concentrations of these gases in the atmosphere have increased and are still increasing rapidly, that climate change is occurring, and that most of the recent change is almost certainly due to emissions of greenhouse gases caused by human activities. Further climate change is inevitable; if emissions of greenhouse gases continue unabated, future changes will substantially exceed those that have occurred so far. There remains a range of estimates of the magnitude and regional expression of future change, but increases in the extremes of climate that can adversely affect natural ecosystems and human activities and infrastructure are expected.

Citizens and governments can choose among several options (or a mixture of those options) in response to this information: they can change their pattern of energy production and usage in order to limit emissions of greenhouse gases and hence the magnitude of climate changes; they can wait for changes to occur and accept the losses, damage, and suffering that arise; they can adapt to actual and expected changes as much as possible; or they can seek as yet unproven “geoengineering” solutions to counteract some of the climate changes that would otherwise occur. Each of these options has risks, attractions and costs, and what is actually done may be a mixture of these different options. Different nations and communities will vary in their vulnerability and their capacity to adapt. There is an important debate to be had about choices among these options, to decide what is best for each group or nation, and most importantly for the global population as a whole. The options have to be discussed at a global scale because in many cases those communities that are most vulnerable control few of the emissions, either past or future. Our description of the science of climate change, with both its facts and its uncertainties, is offered as a basis to inform that policy debate.

A CKNOWLEDGEMENTS

The following individuals served as the primary writing team for the 2014 and 2020 editions of this document:

• Eric Wolff FRS, (UK lead), University of Cambridge
• Inez Fung (NAS, US lead), University of California, Berkeley
• Brian Hoskins FRS, Grantham Institute for Climate Change
• John F.B. Mitchell FRS, UK Met Office
• Tim Palmer FRS, University of Oxford
• Benjamin Santer (NAS), Lawrence Livermore National Laboratory
• John Shepherd FRS, University of Southampton
• Keith Shine FRS, University of Reading.
• Susan Solomon (NAS), Massachusetts Institute of Technology
• Kevin Trenberth, National Center for Atmospheric Research
• John Walsh, University of Alaska, Fairbanks
• Don Wuebbles, University of Illinois

Staff support for the 2020 revision was provided by Richard Walker, Amanda Purcell, Nancy Huddleston, and Michael Hudson. We offer special thanks to Rebecca Lindsey and NOAA Climate.gov for providing data and figure updates.

The following individuals served as reviewers of the 2014 document in accordance with procedures approved by the Royal Society and the National Academy of Sciences:

• Richard Alley (NAS), Department of Geosciences, Pennsylvania State University
• Alec Broers FRS, Former President of the Royal Academy of Engineering
• Harry Elderfield FRS, Department of Earth Sciences, University of Cambridge
• Joanna Haigh FRS, Professor of Atmospheric Physics, Imperial College London
• Isaac Held (NAS), NOAA Geophysical Fluid Dynamics Laboratory
• John Kutzbach (NAS), Center for Climatic Research, University of Wisconsin
• Jerry Meehl, Senior Scientist, National Center for Atmospheric Research
• John Pendry FRS, Imperial College London
• John Pyle FRS, Department of Chemistry, University of Cambridge
• Gavin Schmidt, NASA Goddard Space Flight Center
• Emily Shuckburgh, British Antarctic Survey
• Gabrielle Walker, Journalist
• Andrew Watson FRS, University of East Anglia

The Support for the 2014 Edition was provided by NAS Endowment Funds. We offer sincere thanks to the Ralph J. and Carol M. Cicerone Endowment for NAS Missions for supporting the production of this 2020 Edition.

F OR FURTHER READING

For more detailed discussion of the topics addressed in this document (including references to the underlying original research), see:

• Intergovernmental Panel on Climate Change (IPCC), 2019: Special Report on the Ocean and Cryosphere in a Changing Climate [ https://www.ipcc.ch/srocc ]
• National Academies of Sciences, Engineering, and Medicine (NASEM), 2019: Negative Emissions Technologies and Reliable Sequestration: A Research Agenda [ https://www.nap.edu/catalog/25259 ]
• Royal Society, 2018: Greenhouse gas removal [ https://raeng.org.uk/greenhousegasremoval ]
• U.S. Global Change Research Program (USGCRP), 2018: Fourth National Climate Assessment Volume II: Impacts, Risks, and Adaptation in the United States [ https://nca2018.globalchange.gov ]
• IPCC, 2018: Global Warming of 1.5°C [ https://www.ipcc.ch/sr15 ]
• USGCRP, 2017: Fourth National Climate Assessment Volume I: Climate Science Special Reports [ https://science2017.globalchange.gov ]
• NASEM, 2016: Attribution of Extreme Weather Events in the Context of Climate Change [ https://www.nap.edu/catalog/21852 ]
• IPCC, 2013: Fifth Assessment Report (AR5) Working Group 1. Climate Change 2013: The Physical Science Basis [ https://www.ipcc.ch/report/ar5/wg1 ]
• NRC, 2013: Abrupt Impacts of Climate Change: Anticipating Surprises [ https://www.nap.edu/catalog/18373 ]
• NRC, 2011: Climate Stabilization Targets: Emissions, Concentrations, and Impacts Over Decades to Millennia [ https://www.nap.edu/catalog/12877 ]
• Royal Society 2010: Climate Change: A Summary of the Science [ https://royalsociety.org/topics-policy/publications/2010/climate-change-summary-science ]
• NRC, 2010: America’s Climate Choices: Advancing the Science of Climate Change [ https://www.nap.edu/catalog/12782 ]

Much of the original data underlying the scientific findings discussed here are available at:

• https://data.ucar.edu/
• https://climatedataguide.ucar.edu
• https://iridl.ldeo.columbia.edu
• https://ess-dive.lbl.gov/
• https://www.ncdc.noaa.gov/
• https://www.esrl.noaa.gov/gmd/ccgg/trends/
• http://scrippsco2.ucsd.edu
• http://hahana.soest.hawaii.edu/hot/

Climate change is one of the defining issues of our time. It is now more certain than ever, based on many lines of evidence, that humans are changing Earth's climate. The Royal Society and the US National Academy of Sciences, with their similar missions to promote the use of science to benefit society and to inform critical policy debates, produced the original Climate Change: Evidence and Causes in 2014. It was written and reviewed by a UK-US team of leading climate scientists. This new edition, prepared by the same author team, has been updated with the most recent climate data and scientific analyses, all of which reinforce our understanding of human-caused climate change.

Scientific information is a vital component for society to make informed decisions about how to reduce the magnitude of climate change and how to adapt to its impacts. This booklet serves as a key reference document for decision makers, policy makers, educators, and others seeking authoritative answers about the current state of climate-change science.

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Using the ocean as a carbon sink may be our best hope against climate change

Reducing our carbon emissions to slow global warming is no longer enough. we need more research on how to safely scale up carbon removal..

I ’ve spent hundreds of days at sea. In the high winds and towering waves of the Southern Ocean around Antarctica, I have worked alongside fellow ocean scientists to understand the impacts of climate change. To stop or slow its effects, humanity must reduce its carbon emissions. However, that is no longer enough: We must also pull carbon dioxide out of the atmosphere and sequester it in the earth or the ocean.

That’s been controversial, but I am researching a way that could have fewer side effects than other proposed methods: ocean iron fertilization — a technique that encourages the growth of microscopic algae, which eat carbon dioxide and then squirrel it away in the ocean’s depths for decades or even centuries.

As someone who has dedicated my life to understanding the ocean, I share others’ concerns about using the ocean to sequester our excess carbon. Intentionally manipulating the marine environment for our own benefit rightly worries many people. However, as the decades have passed, consequences have mounted and alternatives have expired. For Mainers like me, the effects of climate change are hard to ignore. Coastal flooding in January caused an estimated $70 million in damage . The sea level in the Gulf of Maine has already risen nearly a foot in the past century — and is still rising, now faster than ever .

I was a graduate student on the last US-funded ocean iron fertilization project in 2002, and I have spent the past 20 years studying the response of ocean algae to iron in seawater. At the start of my career, carbon dioxide removal was largely on the fringe of the climate change conversation. For many, it was seen as a distraction from emissions reduction efforts. What work was done was funded primarily by entrepreneurs, while most federally funded scientists like me eventually distanced ourselves from early experimentation.

But recent Intergovernmental Panel on Climate Change reports have shown that we can’t achieve climate stability without carbon dioxide removal , and in 2022, the National Academies of Sciences, Engineering, and Medicine issued a report highlighting the need for carbon dioxide removal research. The federal government is already investing billions of dollars in removal projects , with private philanthropy pledging hundreds of millions more .

Just last month, the National Oceanic and Atmospheric Administration and the Department of Energy signed an agreement to pursue marine carbon removal strategies, a promising pathway that relies on amplifying natural processes in the ocean.

The ocean: A natural carbon sink

The ocean covers two-thirds of Earth’s surface, holds 50 times more carbon dioxide than the atmosphere, and holds 15 times more than all land plants and soils combined. About 10 times more atmospheric carbon dioxide moves through the ocean each year than is emitted by human activities. All of this suggests that the ocean might safely store human-emitted carbon without serious harm to its ecosystem.

To that end, several ideas have been put forward to increase the ocean’s capacity to hold carbon dioxide, from expanding seaweed cultivation to deploying electrochemical technologies in order to alter seawater chemistry. All have potential upsides and downsides.

One idea is, essentially, to give the ocean an antacid. Acidification is wreaking havoc in the ocean, so adding minerals that increase the pH of seawater (lowering its level of acidity) both counteracts the effects of ocean acidification and draws down more carbon dioxide from the atmosphere. Scientists are testing the efficacy, costs, and potential side effects of ocean alkalinity enhancement, as that process is known. But the approach isn’t without downsides: It would likely require the mining, transportation, processing, and distribution of billions of tons of rock minerals, significantly increasing mining and transportation activities: The National Academies of Sciences, Engineering, and Medicine estimates that the global shipping fleet and its associated carbon footprints would grow by 10 percent or more . The approach could also result in potentially toxic byproducts like heavy metals making their way into the ocean in the process.

I think ocean iron fertilization may be a better way. Here’s how it would work: Certain nutrients, like iron, encourage the productivity of the microscopic algae that feed on carbon dioxide in seawater. Scientists have considered supercharging that process by fertilizing nutrient-limited regions, like the Southern Ocean around Antarctica, with additional iron to spur large blooms of algae. Those blooms could then draw more carbon dioxide into the ocean, and when the algae die and sink, they would carry that carbon with them to the ocean floor.

In comparison with other options, ocean iron fertilization is low-tech, scalable, and likely to be relatively inexpensive, and unlike building thousands of carbon-capture factories or planting trillions of trees, iron fertilization does not require massive land, freshwater, or energy resources.

But, as with alkalinity enhancement, there are important unknowns. How effective might this approach be? How long would the carbon remain in the deep ocean? What effects would more algae have on oxygen levels and productivity in the ocean? This strategy has been on our radar for decades — yet climate change has far outpaced any research on its effectiveness, costs, and potential side effects.

Early skepticism of carbon removal isn’t the whole picture

The first ocean fertilization experiments were conducted 30 years ago in remote corners of the Pacific and Southern oceans — they showed that more iron stimulates algae growth. However, those early experiments weren’t designed to assess algae’s potential for carbon storage over the long term, and they didn’t explore what the environmental impacts might be of injecting iron into the ocean. In those early experiments, measurements of how much carbon actually sank to the ocean floor were inconsistent, and scientists often couldn’t stick around long enough to monitor the full life of the algae bloom. Nevertheless, a handful of for-profit entities entered the space, some of which proceeded to make unsupported claims that ocean iron fertilization could revitalize fishing stocks or remove large amounts of carbon from the atmosphere.

Like many others in my field, I distanced myself from those early efforts to commercialize ocean iron fertilization, feeling that proponents were overselling the technology and hiding the potential risks — and that we should focus our attention on reducing carbon emissions, not carbon removal and storage.

But the failed promises of those early commercial efforts may not represent the full potential of iron fertilization as a method for carbon removal. I’ve come to believe that we must at least consider large-scale carbon dioxide removal, and I feel an obligation to do what I can to ensure that it is done responsibly and ethically.

Part of that task is helping the public understand the perspective of scientists. I’ve encountered passionate ocean advocates who have shared with me their concerns about the idea of intentionally altering this globally important ecosystem and common resource. Similarly, scientists participating in the early large-scale iron fertilization experiments noted their shock seeing a bloom form in front of their eyes and realizing they’d altered the environment in real time.

But everyone’s daily actions are already affecting the ocean. It has been absorbing our carbon emissions for more than a century. It may seem counterintuitive to ask the ocean to store even more carbon for us, but doing so just might be our best hope.

Better carbon removal methods may be on the horizon

It is time to undertake a new generation of ocean iron fertilization experiments. We need to fertilize larger areas and monitor them for longer. We need to test for possible unintended consequences, like the growth of undesirable toxic algae or the inadvertent production of other greenhouse gases like methane and nitrous oxide. And we need to measure just how effectively — and for how long — carbon is removed from the atmosphere with this method.

Fortunately, we can now supply answers to questions that weren’t possible during early experiments. We have better tools to track the fate of iron and carbon in the ocean, including satellites that monitor algae blooms and advanced buoys that can measure carbon movement when ships can’t be on-site. Our overall understanding of the ocean has also improved.

In my decades of experience working at sea, I’ve been struck by how vast and dynamic the ocean is. Even our largest experimental algae blooms are dwarfed by natural ones. Iron is difficult to dissolve in seawater so it usually takes days of adding it, a little bit at a time, before we see any change. And most of our blooms dissipate in a matter of weeks as they’re rapidly diluted by ocean currents.

That said, more research is needed and should be done by academics and nonprofit organizations to reduce conflicts of interest and improve public accountability. Although private investment and capital will likely be needed to scale any carbon removal technology, that investment first needs to be based on a foundation of rigorous, objective, careful, and transparent research.

There will be tradeoffs involved in carrying out any method of carbon removal on a global scale. Ocean alkalinity enhancement would require major new mining efforts. Ocean iron fertilization could affect the fishing industry and fish stocks in unpredictable ways. We have been unintentionally geoengineering our atmosphere since the Industrial Revolution, and as unpalatable as it may be, we may need to further manipulate the ocean to help fix the problem. The last time atmospheric carbon dioxide was at the current concentration — nearly 3 million years ago — sea level was more than 20 feet above the current level , meaning unless we do something now, we can expect such a rise to happen again.

The climate crisis presents a daunting challenge, and we will need all the data we can get to make informed decisions about the hard choices coming our way.

Benjamin Twining is a senior research scientist and the vice president for education at the Bigelow Laboratory for Ocean Sciences in East Boothbay, Maine. He holds a PhD in coastal oceanography from Stony Brook University.

Warming effects on plant regrowth after clipping are modified by repeated clipping in Mongolian pasture species

• Yoshihara, Yu
• Gantsetseg, Batdelger
• Kinugasa, Toshihiko

Global warming may pose a threat to the productivity of grazed grasslands. In this study, we investigated changes in the warming response of aboveground regrowth with the repetition of simulated grazing in two Mongolian pasture species, Agropyron cristatum and Stipa krylovii. Plants were grown under warming or non-warming conditions and subjected to repeated clipping of aboveground parts three times at 4-week intervals. Aboveground parts collected at each clipping and whole plants harvested at the end of the experiment were dried and weighed. Specific leaf area (SLA) and the content of nitrogen (N) and crude fiber (CF) in leaves were measured to evaluate leaf morphology and pasture nutritional value. In both species, warming had little effect on regrowth when clipping was repeated one or two times. In A. cristatum, however, warming significantly diminished regrowth when clipping was repeated three times. Belowground biomass decreased with clipping-regrowth cycles only in A. cristatum, and the decline was enhanced by warming, implying that the depletion of belowground reserves contributed to the reduction of regrowth in this species. SLA and the N and CF contents were similar in the warming and non-warming treatments, indicating that warming had little effect on leaf morphology and pasture nutritive value in these Mongolian pasture species. Our results suggest that warming would likely have little effect on regrowth performance of grassland plants under lightly grazed conditions, but warming can decrease regrowth when grazing frequency is high, with the degree of decrease being species dependent.

• Arid region;
• Productivity;

The Principal Nations of the Allied Powers in World War II

This essay is about the formation and contributions of the Allied Powers during World War II, focusing on the United States, the Soviet Union, the United Kingdom, and China. It details the entry of each nation into the war, their significant military and political efforts, and how their collaboration led to the defeat of the Axis Powers. The essay also highlights the roles of other supporting countries and resistance movements, emphasizing the importance of international cooperation in achieving victory and restoring global stability.

How it works

World Second War saw formation of Interallied plenary Powers, coalition did to contrasting of aggression of plenary Powers’ of Axis and proceeding in global stability. This powerful alliance included some of world the most influential people, every help uniquely to war effort. Key members of Interallied plenary Powers were the united states, Soviet Union, United Kingdom, and by China, with every people, playing critical role to the soldiery and political campaigns that took to victory.

The states united were by an active participant in war, what follows by Japanese, attack Port Pearl 7 of December, 1941.

Before then, U.S. supported position to neutrality, though then supported Allies through the program Lend-lease, providing substantial supplies. Include once, the united states became the source of activity of military products and working supplies. The American zmusza the played central roles in key campaigns, for example encroachment of Day of appeal of Normandy and Room battles against Japan. Industrial force of U.S., combined with his technological innovations and wide supplies, was critical to the possible defeat of plenary Powers of Axis.

Soviet Union, under leadership Joseph of Stalin, was the second critical member of Interallied plenary Powers. Foremost, Soviet Union signed an agreement about non-aggression with Nazi Germany in 1939, but this agreement was broken, when Germany put in an operation Operating Barbarossa to 1941, Soviet territory, what breaks in. East Facade then happened to one of most and najbrzydsze seats of wars. Resilient and victim of the Soviet people, together with their strategic military operations, assisted turning of stream against Germany. Battles of Stalingrad and Kursk are an example Soviet determination and tactical brilliance, considerably weakens German zmusza and assisting complete success of Allies.

United Kingdom, led Premier Winston Churchill, stood how stronghold of resistance against aggression of Axis from the beginning of war. After the slump of France in 1940, Britain was left to militate only against Germany to the united states and Soviet Union did not join to the conflict. UK stood substantial difficulties, by the way Blitz, the campaign of bombardment lasted by Germany. Without regard to these calls, Britain remained proof, with his strategic time-table and strong marine presence, what appears vital in support of control of Atlantyku and such, that supports an action in North Africa and Italy. The Britishs also played substantial role to war of secret service, with large achievements for example cracking of koda of Riddle, providing Allies the critical penetrating in German plans.

China role in Interallied plenary Powers, though often separated less than, was however substantial. China was at war with Japan, beginning 1937, long before more wide conflict of the World Second War broke through. War of Sino-japanese Lasted dried up the Japanese supplies and attention, helping Interallied strategy everywhere. Under guidance Chiang Kai-shek, China of general support from the states united through the theatre of China-burma-india, facilitating the stream of supplies and help. China zmuszaj?, without regard to that, to be complicated by internal separations and limited supplies, able to oblige substantial portion of Japanese military, assisting possible Interallied victory in a pacific ocean.

After these primary people, Interallied plenary Powers included numerous the second countries and banishment in governments, that wars are inlaid to effort. People for example Canada, Australia, New Zeland, and South Africa provided critical support in the different seats of wars, from Europe to the pacific ocean. Additionally, motions of resistance within the limits of zaj?tych countries played a substantial role to Axis of rebel manage and helping the Interallied actions.

The collaboration and collective strength of the Allied Powers were crucial in overcoming the formidable challenge posed by the Axis Powers. Each member nation brought unique strengths and faced distinct challenges, but their unified efforts were essential in achieving victory and restoring peace. The legacy of this alliance underscores the importance of international cooperation in addressing global threats and preserving stability.

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Here’s Where Kamala Harris Stands on Climate

She pursued polluters as attorney general in California and later staked out bold positions as a senator, including sponsorship of the Green New Deal.

By Lisa Friedman

• July 22, 2024

Vice President Kamala Harris has for years made the environment a top concern, from prosecuting polluters as California’s attorney general to sponsoring the Green New Deal as a senator to casting the tiebreaking vote as vice president for the 2022 Inflation Reduction Act, the largest climate investment in United States history.

As she runs for the White House, Ms. Harris is widely expected to try to protect the climate achievements of the Biden administration, a position that could resonate with voters during a summer of record heat. A clear majority of Americans, 65 percent, wants the country to focus on increasing solar, wind and other renewable energy and not fossil fuels, according to a May survey by the Pew Research Center.

Last year, Ms. Harris flew to the United Nations global climate summit in Dubai, United Arab Emirates, where she told world leaders that “the urgency of this moment is clear. The clock is no longer just ticking, it is banging. And we must make up for lost time.”

That was a subtle reference to former President Donald J. Trump, who made the United States the first and only country to withdraw from the global Paris Agreement to limit greenhouse gas emissions. (The United States subsequently rejoined under President Biden.) The Republican nominee in the current race for the White House, Mr. Trump has indicated that he would again pull back from the global fight against climate change if he is elected in November.

“Around the world, there are those who seek to slow or stop our progress, leaders who deny climate science, delay climate action, and spread misinformation,” Ms. Harris said at the summit. “In the face of their resistance and in the context of this moment, we must do more.”

Republicans have targeted the Inflation Reduction Act, promising to overturn it if they win control of Congress and the White House. That law pumps more than $370 billion over 10 years into wind, solar, batteries and electric vehicles. It is designed to help the country move away from fossil fuels, the burning of which is driving up global temperatures. At their convention last week, Republicans promised to halt any transition away from oil, gas and coal, and to promote more fossil fuel development.

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The Gunman and the Would-Be Dictator

Violence stalks the president who has rejoiced in violence to others.

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When a madman hammered nearly to death the husband of then–House Speaker Nancy Pelosi, Donald Trump jeered and mocked . One of Trump’s sons and other close Trump supporters avidly promoted false claims that Paul Pelosi had somehow brought the onslaught upon himself through a sexual misadventure.

After authorities apprehended a right-wing-extremist plot to abduct Michigan Governor Gretchen Whitmer, Trump belittled the threat at a rally. He disparaged Whitmer as a political enemy. His supporters chanted “Lock her up.” Trump laughed and replied , “Lock them all up.”

Fascism feasts on violence. In the years since his own supporters attacked the Capitol to overturn the 2020 election—many of them threatening harm to Speaker Pelosi and Vice President Mike Pence—Trump has championed the invaders, would-be kidnappers, and would-be murderers as martyrs and hostages. He has vowed to pardon them if returned to office. His own staffers have testified to the glee with which Trump watched the mayhem on television.

Now the bloodshed that Trump has done so much to incite against others has touched him as well. The attempted murder of Trump—and the killing of a person nearby—is a horror and an outrage. More will be learned about the man who committed this appalling act, and who was killed by the Secret Service. Whatever his mania or motive, the only important thing about him is the law-enforcement mistake that allowed him to bring a deadly weapon so close to a campaign event and gain a sight line of the presidential candidate. His name should otherwise be erased and forgotten.

It is sadly incorrect to say, as so many have, that political violence “has no place” in American society. Assassinations, lynchings, riots, and pogroms have stained every page of American political history. That has remained true to the present day. In 2016 , and even more in 2020, Trump supporters brought weapons to intimidate opponents and vote-counters. Trump and his supporters envision a new place for violence as their defining political message in the 2024 election. Fascist movements are secular religions. Like all religions, they offer martyrs as their proof of truth. The Mussolini movement in Italy built imposing monuments to its fallen comrades. The Trump movement now improves on that: The leader himself will be the martyr in chief, his own blood the basis for his bid for power and vengeance.

Christopher R. Browning: A new kind of fascism

The 2024 election was already shaping up as a symbolic contest between an elderly and weakening liberalism too frail and uncertain to protect itself and an authoritarian, reactionary movement ready to burst every barrier and trash every institution. To date, Trump has led only a minority of U.S. voters, but that minority’s passion and audacity have offset what it lacks in numbers. After the shooting, Trump and his backers hope to use the iconography of a bloody ear and face, raised fist, and call to “Fight!” to summon waverers to their cause of installing Trump as an anti-constitutional ruler, exempted from ordinary law by his allies on the Supreme Court.

Other societies have backslid to authoritarianism because of some extraordinary crisis: economic depression, hyperinflation, military defeat, civil strife. In 2024, U.S. troops are nowhere at war. The American economy is booming, providing spectacular and widely shared prosperity. A brief spasm of mild post-pandemic inflation has been overcome. Indicators of social health have abruptly turned positive since Trump left office after years of deterioration during his term. Crime and fatal drug overdoses are declining in 2024; marriages and births are rising. Even the country’s problems indirectly confirm the country’s success: Migrants are crossing the border in the hundreds of thousands, because they know, even if Americans don’t, that the U.S. job market is among the hottest on Earth.

Yet despite all of this success, Americans are considering a form of self-harm that in other countries has typically followed the darkest national failures: letting the author of a failed coup d’état return to office to try again.

One reason this self-harm is nearing consummation is that American society is poorly prepared to understand and respond to radical challenges, once those challenges gain a certain mass. For nearly a century, “radical” in U.S. politics has usually meant “fringe”: Communists, Ku Kluxers, Black Panthers, Branch Davidians, Islamist jihadists. Radicals could be marginalized by the weight of the great American consensus that stretches from social democrats to business conservatives. Sometimes, a Joe McCarthy or a George Wallace would throw a scare into that mighty consensus, but in the past such challengers rarely formed stable coalitions with accepted stakeholders in society. Never gaining an enduring grip on the institutions of state, they flared up and burned out.

Trump is different. His abuses have been ratified by powerful constituencies. He has conquered and colonized one of the two major parties. He has defeated—or is on the way to defeating—every impeachment and prosecution to hold him to account for his frauds and crimes. He has assembled a mass following that is larger, more permanent, and more national in reach than any previous American demagogue. He has dominated the scene for nine years already, and he and his supporters hope they can use yesterday’s appalling event to extend the Trump era to the end of his life and beyond.

The American political and social system cannot treat such a person as an alien. It inevitably accommodates and naturalizes him. His counselors, even the thugs and felons, join the point-counterpoint dialogue at the summit of the American elite. President Joe Biden nearly wrecked his campaign because he felt obliged to meet Trump in debate. How could Biden have done otherwise? Trump is the three-time nominee of the Republican Party; it’s awkward and strange to treat him as an insurrectionist against the American state—though that’s what Trump was and is.

David Frum: Biden’s heartbreaking press conference

The despicable shooting at Trump, which also caused death and injury to others, now secures his undeserved position as a partner in the protective rituals of the democracy he despises. The appropriate expressions of dismay and condemnation from every prominent voice in American life have the additional effect of habituating Americans to Trump’s legitimacy. In the face of such an outrage, the familiar and proper practice is to stress unity, to proclaim that Americans have more things in common than that divide them. Those soothing words, true in the past, are less true now.

Nobody seems to have language to say: We abhor, reject, repudiate, and punish all political violence, even as we maintain that Trump remains himself a promoter of such violence, a subverter of American institutions, and the very opposite of everything decent and patriotic in American life.

The Republican National Convention, which opens this week, will welcome to its stage apologists for Vladimir Putin’s Russia and its aggression against U.S. allies. Trump’s own infatuation with Russia and other dictatorships has not dimmed even slightly with age or experience. Yet all of these urgent and necessary truths must now be subordinated to the ritual invocation of “thoughts and prayers” for someone who never gave a thought or uttered a prayer for any of the victims of his own many incitements to bloodshed. The president who used his office to champion the rights of dangerous people to own military-type weapons says he was grazed by a bullet from one such assault rifle.

Conventional phrases and polite hypocrisy fill a useful function in social life. We say “Thank you for your service” both to the decorated hero and to the veteran who barely escaped dishonorable discharge. It’s easier than deciphering which was which. We wish “Happy New Year!” even when we dread the months ahead.

Adrienne LaFrance: Thoughts, prayers, and Facebook rants aren’t enough

But conventional phrases don’t go unheard. They carry meanings, meanings no less powerful for being rote and reflexive. In rightly denouncing violence, we are extending an implicit pardon to the most violent person in contemporary U.S. politics. In asserting unity, we are absolving a man who seeks power through the humiliation and subordination of disdained others.

Those conventional phrases are inscribing Trump into a place in American life that he should have forfeited beyond redemption on January 6, 2021. All decent people welcome the sparing of his life. Trump’s reckoning should be with the orderly process of law, not with the bloodshed he rejoiced in when it befell others. He and his allies will exploit a gunman’s vicious criminality as their path to exonerate past crimes and empower new ones. Those who stand against Trump and his allies must find the will and the language to explain why these crimes, past and planned, are all wrong, all intolerable—and how the gunman and Trump, at their opposite ends of a bullet’s trajectory, are nonetheless joined together as common enemies of law and democracy.

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