(Teragrams of carbon dioxide equivalents)
|Vehicle type||1990||1999||Growth rate 1990-1999|
|Boats and vessels||59.4||65.6||10%|
|International Bunker Fuels3||114||107.3||-6%|
1 Aircraft emissions are from all jet fuel (less bunker fuels) and aviation gas consumption.
2 "Other" carbon dioxide emissions are from motorcycles, construction equipment, agricultural machinery, pipelines, and lubricants.
3 U.S. emissions from International Bunker Fuels are from both civilian and military activities, but are not included in totals.
NOTE: The equation to convert teragrams of carbon dioxide equivalents (TgCO2Eq.) to million metric tons of carbon equivalent (mmtce) is: TgCO2Eq. = mmtce x (44/12).
SOURCE: U.S. Environmental Protection Agency, Inventory of U.S. Greenhouse Gas Emissions and Sinks: 1990-1999, EPA-236-R-01-001 (Washington, DC: April 2001), table ES-4.