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    The science is settled

    We know it’s happening, and we know why: carbon pollution from fossil fuels is warming our planet and throwing natural systems out of balance.

    You don’t have to look far to see the results. Hotter temperatures, stronger storms, rising seas, and so much more, threatening the health of our families and the future we pass on to generations to come.

    But what’s going on and why? Let’s start here:

    What’s Global Warming and Climate Change

    Some people use the terms “climate change” and “global warming” interchangeably, so to get to a definition of the one, we’re going to talk about them both because they are profoundly linked but not exactly the same thing.

    “‘Global warming’ refers to the long-term warming of the planet. Global temperature shows a well-documented rise since the early 20th century and most notably since the late 1970s,” according to NASA. “Worldwide, since 1880 the average surface temperature has risen about 1° C (about 2° F), relative to the mid-20th-century baseline (of 1951-1980).”

    This rise in global temperatures is causing our climate – the average weather patterns for a particular region over a long period of time, typically 30 or more years – to change.

    So, “climate change” is a broad, general term for these changes. It’s largely the consequence of the warming described above, and includes everything from the increasing incidence of extreme weather events like powerful hurricanes and severe drought to more frequent flooding and longer-lasting heat waves. It’s the accelerated ice melt we’re seeing in Greenland, Antarctica, and the Arctic and the related rise in global sea levels rise. It’s worsening pollen seasons, spreading vector-borne diseases, and much, much more.


    Are Humans Causing Climate Change?

    Put simply, here’s what we know for sure:

    - We know that carbon dioxide (and other greenhouse gases) trap heat in the Earth’s atmosphere.
    - And we know that humans are burning fossil fuels, releasing huge amounts of carbon pollution and trapping more and more heat in the atmosphere.
    - There’s only one conclusion: humans are the primary reason the planet is warming and we see our climate changing today.


    This is what we know

    Carbon pollution from burning fossil fuels like coal, oil, and natural gas is warming our planet and causing climate change.

    It’s simple: the more carbon pollution in the air, the more the sun’s energy gets trapped as heat. Which means things keep getting hotter. You’ve almost certainly heard the phrase “global warming”? In fact, the world has already gotten nearly 1°C warmer since 1880.

    Warmer temperatures have real consequences for all of us—not just for polar bears. Sea levels around the world have risen nearly 20cm (7.8 inches) since 1901, swallowing entire islands and creeping closer to populated areas of great coastal cities like New York, Melbourne, and Dakar.

    Plus, extreme weather events like hurricanes, floods, and droughts are becoming more frequent and intense. Witness the devastation in 2017 as Hurricane Harvey tore through the Caribbean and southern US, destroying homes and leaving millions without power for weeks and even months.

    "Climate 101" with Bill Nye

    What You Can Do

    Watch & Share Watch this video and share it with your network.

    Take Climate 101 with Bill Nye (the Science Guy) and learn the scientific fundamentals of climate change in under five minutes.

    The warming that we’ve seen in the last 30 years is clearly due to human-made greenhouse gases. - James Hansen Former director, NASA Goddard Institute for Space Studies
    The denial machine

    Meanwhile, Big Polluters like oil and coal companies aren’t going down without a fight. After all, they’re making billions from dirty energy while the rest of us pay to clean up their mess. That’s why they’ve spent decades running well-funded campaigns to mislead and deceive the public about what’s really happening to the planet.

    These polluters — and the special-interest groups they support — are even following the exact same playbook as the tobacco industry used to confuse the public about smoking and cancer in their efforts to stifle climate protection.

    But scientists aren’t confused about carbon pollution and climate change. And we shouldn’t be either. If Big Polluters are spreading lies and blocking our path to a clean-energy future, then it’s up to us to call them out and get them out of the way.

    After all, our future is at stake – and we can’t leave it in the hands of a few powerful corporations.


    What You Can Do

    Watch & Share Watch this video and share it with your network.

    Why are climate change deniers using the same twisted strategies as Big Tobacco to instill doubt? Maybe it's because in both cases, the facts are not in their favor.

    Pricing Pollution: The Fair Climate Solution

    We know carbon pollution from fossil fuels is causing global warming and disrupting our natural systems.

    We know what it’s costing us. More extreme weather disasters, higher healthcare bills, and an uncertain future for our children, to name only a few. All while fossil fuel companies rake in billions.

    So how do we turn this around? How do we make energy fair?

    We start by pricing carbon pollution. Pricing pollution means putting a fair market price on greenhouse gas emissions so the companies responsible pay for the damage they do.

    Pricing pollution isn’t just about making companies pay. It’s also about encouraging them to make better energy choices and choose cleaner alternatives like wind and solar. Because when they do, they pollute less and they pay less.

    Less pollution means less climate change. Which means we all win. 

    "The Cost of Carbon"

    What You Can Do

    Watch & Share Watch this video and share it with your network.

    It's the number one threat to the future of our planet, and we can no longer afford to pay its staggering costs. 

    What you can do

    A global challenge needs a global solution. So, we’re inviting everyone to join the solution culture that’s taking on the biggest issue humanity has ever faced and help create a sustainable future for the Earth.

    There are many ways you can help. Wherever you are, whatever you do, and whatever time you have, you can help bring us one step closer to a future without carbon pollution.

    Whether it’s watching a video to learn more about the issue, sharing a post, or training as a Climate Reality Leader, the actions you take can have a real impact and propel our movement forward.

    The future we want is there for the taking – but only if we work together.

    So you want to learn about the climate crisis: a quick guide to the basics

    What You Can Do

    So you want to learn about the climate crisis: a quick guide to the basics Download our free Climate Crisis 101 e-book now. Download


    What You Can Do

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    What You Can Do

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    Additional Climate Change Resources


    NASA’s Global Climate Change page is a one-stop resource not only for climate change science information, but also a variety of other climate-related multimedia data and mapping resources.

    Intergovernmental Panel on Climate Change

    The most recent global climate assessment, including future projects as well as other special reports are available through the IPCC’s portal.

    U.S. Environmental Protection Agency

    The U.S. Environmental Protection Agency web site includes a comprehensive climate science section and provides users information about impacts by region and strategies for mitigating and adapting.

    U.S. Global Change Research Program

    The U.S. Global Change Research Program conducts comprehensive assessments about the impacts of climate change in the U.S., including regional impacts, both observed and projected.

    The U.S. National Oceanic and Atmospheric Administration

    The U.S. National Oceanic and Atmospheric Administration’s climate website consolidates U.S. climate trends, data, climate change news, as well as teaching aids and tools to help explain the issues better.


    Skeptical Science

    Skeptical Science provides its users with the basics of climate change science as well as rebuttals to some of the most common myths perpetuated by climate change deniers.


    Climate Central

    Climate Central is a credible source of climate change news and analysis, as well as a range of videos, graphics and mapping tools that visualize local impacts like heat, extreme weather, and sea level rise.


    Renewable Energy World

    Renewable Energy World is a great news site focused solely on reporting renewable energy news, information, and recent sector developments.



    Cleantechnica is a blogging site devoted to various types of clean energy. It tracks the latest developments, analyses trends, offers FAQs and 101-style information on clean energy solutions.


    Greentech Media

    Greentech Media is another great site that provides news and analysis on all things green.


    Earthtechling is a blog that aggregates news articles about green buildings, transportation, and energy.

    The Union of Concerned Scientists

    The Union of Concerned Scientists has a “Clean Energy 101” section on their website that is very useful for people who have little or no prior knowledge of what clean energy is.

    The U.S. Energy Information Administration (EIA)

    The U.S. Energy Information Administration (EIA), while not devoted exclusively to clean energy, is a source of U.S. data, trends, graphics, reports, and analysis on renewable energy and carbon emissions.

    The International Renewable Energy Agency (IRENA)

    The International Renewable Energy Agency (IRENA) is an intergovernmental organization that produces reports, analysis, case studies, fact sheets and consolidates statistics related to renewable energy.

    The International Energy Agency (IEA)

    The International Energy Agency (IEA), while not devoted exclusively to clean energy, is a source of global, regional, and country level data, trends, reports on several types of clean energy sources.  

    The Georgetown Climate Center

    The Georgetown Climate Center provides communities with tools and other resources including a searchable Adaptation Clearinghouse resource database.

    Climate Adapt European Climate Adaptation Platform

    Climate Adapt European Climate Adaptation Platform provides users with climate vulnerability information as well as potential adaptation strategies, case studies, and other useful tools.

    NOAA’s Coastal Climate Adaptation site

    NOAA’s Coastal Climate Adaptation site includes a clickable map that lists adaptation-planning resources by state.

    Secretariat of the Pacific Regional Environment Programme

    Secretariat of the Pacific Regional Environment Programme’s Pacific Adaptation to Climate Change page is a Pacific-region focused resource helping communities to become more resilient to climate change’s impacts.

    George Mason Center for Climate Change Communication

    George Mason Center for Climate Change Communication maintains a site dedicated to providing resources for effective communication of climate change.

    Yale Project on Climate Change Communication

     Yale Project on Climate Change Communication offers communication resources on a variety of user-selectable topics.