7-5 Greenhouse Gas Emissions by Transportation Mode: 2014
Wednesday, January 4, 2017
percent of TgCO2 Eq.
| Mode | TgCO2 Eq. | Percent |
|---|---|---|
| Highway | 1,531 | 84% |
| Air | 152 | 8% |
| Water | 29 | 2% |
| Rail | 48 | 3% |
| Pipeline | 47 | 3% |
Key: GHG = greenhouse gas. TgCO2 Eq. = teragrams of carbon dioxide equivalent. A teragram = 1 million metric tons.
Note: Percents may not add to 100 due to rounding. Does not include International Bunker Fuels.
Source: U.S. Environmental Protection Agency, Inventory of U.S. Greenhouse Gas Emissions and Sinks: 1990–2014 Report Tables, available at www.epa.gov/climatechange as of October 2016.