Transportation and Climate

Here you will find information on carbon dioxide (CO2) and other greenhouse gas (GHG) emissions from transportation sources, including information about transportation’s contribution to total GHG emissions, relevant EPA regulations, and what you can do to reduce your transportation emissions.

Transportation sources accounted for approximately 29 percent of total U.S. GHG emissions in 2006. Transportation is the fastest-growing source of U.S. GHGs, accounting for 47 percent of the net increase in total U.S. emissions since 1990. Transportation is also the largest end-use source of CO2, which is the most prevalent greenhouse gas. These estimates of transportation GHGs do not include emissions from additional lifecycle processes, such as the extraction and refining of fuel and the manufacture of vehicles, which are also a significant source of domestic and international GHG emissions.

Follow the links below for more information about transportation, mobile sources, and climate change:

Basic Information
What You Can Do
Regulations and Standards: provides information and documents on regulations related to transportation emissions of greenhouse gases.
Tools, Analysis, and Publications: provides detailed information on measuring GHG emissions from transportation sources, transportation-related solutions, programs, and other resources.
Related Links

This page is maintained by EPA's Office of Transportation and Air Quality (OTAQ).
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