Climate Change Science
The Greenhouse Effect
Buildup of greenhouse gases in the atmosphere leads to a changing climate.
Test Your Climate Smarts
Earth’s climate is changing—take our two-minute quiz to test your climate knowledge.
Human Influence on Climate
Human influence on the climate system is an established fact, but reducing greenhouse gas emissions can help limit climate change.
Seasonal Changes and Climate
A new EPA report explores how seasonal patterns are changing in the United States.
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.
Learn about some of the key, foundational concepts related to climate change.
Get to know the main drivers of climate change and how they contribute to a warming climate.
As the climate changes, U.S. regions will experience that change differently.
Scientists regularly monitor our environment, and their findings reveal much about how the climate is changing.
The CIRA project quantifies the physical effects and economic damages of climate change.
EPA has organized answers to some common questions about climate change on a single page.
The following links exit the site.
- Climate Science Special Report
- Fourth National Climate Assessment
- The Impacts of Climate Change on Human Health in the United States: A Scientific Assessment