7-5 Transportation GHG Emissions by Mode: 2011

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percent of TgCO2Eq.

7-5 Transportation GHG Emissions by Mode: 2011

Key: GHG = greenhouse gas. TgCO2 Eq. = teragrams of carbon dioxide equivalent. A teragram = 1 million metric tons.

Note: Percents do not add to 100 due to rounding.

Source: U.S. Environmental Protection Agency, Inventory of U.S. Greenhouse Gas Emissions and Sinks: 1990-2011, available at www.epa.gov/climatechange/ghgemissions/usinventoryreport.html as of August 2013.