Mobile Source Emissions – Past, Present, and Future

General information on different air pollutants produced by mobile sources and fuels, the various programs that EPA's Office of Transportation and Air Quality has undertaken to control emissions of those pollutants, and the impact those programs have had on emissions. Read more.

What You Can Do

This page provides a complete listing of fact sheets and other documents written for the general public. See the resources.

The Green Vehicle Guide

The Green Vehicle Guide provides a simple tool to find the cleanest, most efficient vehicle that meets your needs. See your options.

Clean School Bus USA

Leaders from corporate America, children's health, environmental and governmental organizations gather to design a plan to reduce children's exposure to diesel exhaust by eliminating unnecessary school bus idling, installing effective emission control systems on newer buses and replacing the oldest buses in the fleet with newer ones. Learn more.

The Fuel Economy Guide

The Fuel Economy Guide has information on the fuel economy ratings of different cars and gas mileage tips. The Fuel Economy Guide is sponsored jointly by the U.S. Department of Energy and EPA. See the Fuel Economy Guide.

EPA for Students

This site has games, homework reference resources, awards, events and contests! Parents and teachers can also find resources and lesson plans. Explore!