Climate Change Science

Extreme Heat

Extreme heat is dangerous. Climate change is fueling more heat waves and extreme temperatures. Learn more about extreme heat impacts.
Ocean Acidification

As oceans absorb more carbon dioxide, they become more acidic. This can harm marine ecosystems and the people and economies that rely on them. Learn more about Ocean Acidification as a climate indicator.
Talk About Climate Change

Learning about climate change science and sharing your knowledge with others helps raise awareness about climate change causes, impacts, and solutions. See how you can spread the word.
Wide-Ranging Impacts

Climate change has significant impacts on the natural environment, people, and infrastructure. Learn about the risks to different sectors and actions we can take.

The earth’s climate is changing. Multiple lines of evidence show changes in our weather, oceans, ecosystems, and more. EPA is committed to providing the most up-to-date and accurate climate-science information, including basics, causes, indicators, and impacts of climate change.

Basics

Learn about some of the key, foundational concepts related to climate change.

Learn the basics
Causes

Get to know the main drivers of climate change and how they contribute to a warming climate.

See the causes
Impacts

As the climate changes, U.S. regions will experience that change differently.

View the impacts
Climate Change Indicators

Scientists regularly monitor our environment, and their findings reveal much about how the climate is changing.

Explore the indicators
Climate Change Impacts and Risk Analysis

The CIRA project quantifies the physical effects and economic damages of climate change.

Learn more about CIRA
FAQs About Climate Change

EPA has organized answers to some common questions about climate change on a single page.

Read the FAQs

Climate Change Science

Extreme Heat

Ocean Acidification

Talk About Climate Change

Wide-Ranging Impacts

EPA Resources About Climate Change

More Resources About Climate Change