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

Acid rain, or acid deposition, is a broad term that includes any form of precipitation with acidic components, such as sulfuric or nitric acid that fall to the ground from the atmosphere in wet or dry forms.

The ecological effects of acid rain are most clearly seen in aquatic environments, such as streams, lakes, and marshes where it can be harmful to fish and other wildlife.

Read about how Lucy Lake and her friends learn about acid rain and how to prevent it.