Global Warming Science and Impacts

The causes and consequences of rising global temperatures

The effects of rising temperatures are already being felt across the United States and around the world, with serious implications for our health, our environment, and our economy.

Dangerous heat waves are increasing in frequency. Sea level rise is accelerating. Coastal flooding risks are growing. Extreme storms are on the rise in some areas. More severe droughts are occurring in others. 

The science is clear. Global warming is happening — and we are the primary cause.

But we have the solutions at hand to address this global challenge. We must take immediate action to reduce the heat-trapping emissions that cause global warming.

You can help — and a solid understanding of the science and consequences of global warming is a good way to start.

Global Warming Science

How do we know that global warming is happening? And that human activity is the primary cause?

Overwhelming scientific evidence shows that rising levels of carbon dioxide and other heat-trapping emissions from human activity are driving up the planet's temperature.

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Global Warming Impacts

Photo: Jim Reed/corbis

What are the consequences of rising global temperatures?

The effects of global warming are far-reaching, steadily intensifying, and encompass everything from extreme weather to sea level rise, heat waves to air pollution, wildfires to melting ice.

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We Need Your Support
to Make Change Happen

We can reduce global warming emissions and ensure communities have the resources they need to withstand the effects of climate change—but not without you. Your generous support helps develop science-based solutions for a healthy, safe, and sustainable future.