About the Indicators

Indicators provide an important way to track and communicate the causes and effects of climate change. EPA's indicators are designed to help readers understand long-term trends related to climate change. For example, long-term measurements of temperature in the United States and globally are used as an indicator to track and better understand the effects of changes in the Earth's climate.

EPA partners with more than 50 data contributors from various U.S. and international government agencies, academic institutions, and other organizations to compile these key indicators of climate change. EPA ensures the scientific integrity of the indicators through a rigorous development process that includes peer review by independent technical experts.

Explore the resources on this page for more details.

Data Sources and Methods

EPA follows an established process to identify data, develop indicators, and obtain independent expert review of its indicators. To learn about the data sources and analytical methods used, visit the Data Sources and Methods page.

Frequent Questions

Browse the Frequent Questions about the Indicators to learn more about EPA’s indicators and how they can be used.

Publications

This website always provides the most recent indicator data, but EPA also periodically publishes indicator summaries in reports, brochures, and fact sheets that can be downloaded and printed. Visit the Publications page to access and download these materials.