Learn how air pollution can harm your health and the environment, and what EPA is doing to protect the air we breathe.

EPA’s indicators use the best available observed data to show how the climate is changing.

EPA’s environmental justice mapping and screening tool now includes climate parameters on sea-level rise and flooding. 

Between 2018 and 2019, greenhouse gas emissions decreased 1.7%, primarily because of a drop in fossil fuel combustion emissions, which was largely due to trends in the electric power sector.

Gases that trap heat in the atmosphere are called greenhouse gases.

Do you know your household’s carbon footprint?

Did you ever wonder what reducing carbon dioxide (CO2) emissions by 1 million metric tons means in everyday terms?

EPA partners with more than 40 data contributors from various government agencies, academic institutions, and other organizations to compile a key set of indicators related to the causes and effects of climate change.

Greenhouse gases from human activities are the most significant driver of observed climate change since the mid-20th century.1 

This indicator describes emissions of greenhouse gases in the United States.

This indicator describes emissions of greenhouse gases worldwide.

This indicator describes how the levels of major greenhouse gases in the atmosphere have changed over time.

This indicator measures the “radiative forcing” or heating effect caused by greenhouse gases in the atmosphere.

This indicator describes trends in average precipitation for the United States and the world.

This indicator tracks the frequency of heavy precipitation events in the United States.

This indicator examines changes in the size and frequency of inland river flood events in the United States.

This indicator examines the frequency, intensity, and duration of hurricanes and other tropical storms in the Atlantic Ocean, Caribbean, and Gulf of Mexico.

This indicator measures drought conditions of U.S. lands.

This feature provides a closer look at trends in temperature and drought in the southwestern United States.

Covering about 70 percent of the Earth’s surface, the world’s oceans have a two-way relationship with weather and climate.