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

Understanding and addressing climate change is critical to EPA’s mission of protecting human health and the environment.

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.

This indicator describes trends in the amount of heat stored in the world’s oceans.

This indicator describes how sea level has changed over time. The indicator describes two types of sea level changes: absolute and relative.

This indicator describes changes in the chemistry of the ocean that relate to the amount of carbon dioxide dissolved in the water.

This indicator describes global trends in sea surface temperature.

This feature provides a closer look at one consequence of sea level rise along the Atlantic coast: the conversion of land to open water.