An official website of the United States government.

We've made some changes to If the information you are looking for is not here, you may be able to find it on the EPA Web Archive or the January 19, 2017 Web Snapshot.

Green Vehicle Guide

Fast Facts on Transportation Greenhouse Gas Emissions

The transportation sector is one of the largest contributors to U.S. greenhouse gas (GHG) emissions. According to the Inventory of U.S. Greenhouse Gas Emissions and Sinks 1990–2015 (the national inventory that the U.S. prepares annually under the United Nations Framework Convention on Climate Change), transportation represented 27% of total U.S. GHG emissions in 2015. Cars, trucks, commercial aircraft, and railroads, among other sources, all contribute to transportation sector emissions.

2015 U.S. GHG Emissions by Sector


2015 U.S. Transportation Sector GHG Emissions by Source


Note: Totals may not add to 100% due to rounding. Transportation emissions do not include emissions from non-transportation mobile sources such as agriculture and construction equipment. “Other” sources include buses, motorcycles, pipelines and lubricants.

For more information on U.S. GHG Emissions from Transportation and what the numbers in these pie charts represent, please see: Fast Facts: U.S. Transportation Sector GHG Emissions (PDF)(5 pp, 388 K, EPA-420-F-17-013, July 2017, About PDF)

Previous versions of Fast Facts

Learn More

GHG Emissions from a Typical Passenger Vehicle

U.S. Greenhouse Gas Inventory Report