NOTES: Other greenhouse gas emissions are from motorcycles, pipelines, and lubricants. International bunker fuel emissions (not included in the total) result from the combustion of fuels purchased in the United States but used for international aviation and maritime transportation. U.S. Total, all modes; Aircraft; and Ships and boats include emissions data for only domestic activity only as do all other data shown. International emissions from bunker fuels purchased in the United States are not included. Alternative-fuel vehicle emissions are allocated to the specific vehicle types in which they were classified (i.e., Passenger cars, Light-duty trucks, All other trucks,and Buses).
SOURCE: U.S. Environmental Protection Agency, Inventory of U.S. Greenhouse Gas Emissions and Sinks (2016), table 2-13, available at http://epa.gov/climatechange/emissions/usinventoryreport.html as of April 2016.