Transportation energy data book: edition 23 - Oak Ridge National ...

Gases which contain carbon can be measured in terms of the full molecular weight of the gas
or just in terms of their carbon content. This table presents carbon content. The ratio of the
weight of carbon to carbon dioxide is 0.2727. The transportation sector accounts for
approximately one-third of carbon emissions.
Table 11.4
U.S. Carbon Emissions from Fossil Energy Consumption
by End-Use Sector, 1990–2001 a
(million metric tons of carbon)
End use sector 1990 1995 1996 1997 1998 1999 2000 2001
Residential 257.5 280.1 297.0 295.0 297.6 302.5 318.1 314.9
Commercial 212.6 228.5 237.4 249.3 253.9 258.0 274.4 279.7
Industrial 458.0 468.0 482.2 486.9 479.5 474.2 478.4 452.4
Transportation 431.4 457.4 468.5 473.2 481.3 495.3 507.3 511.6
Percentage 31.7% 31.9% 31.5% 31.5% 31.8% 32.4% 32.1% 32.8%
Total energy 1,359.5 1,434.0 1,485.1 1,504.4 1,512.3 1,530.0 1,578.2 1,558.6
Source:
U.S. Department of Energy, Energy Information Administration, Emissions of Greenhouse Gases in the
United States, 2001, Washington, DC, December 2002, Table 5, and annual.
(Additional resources: www.eia.doe.gov)
aIncludes energy from petroleum, coal, and natural gas. Electric utility emissions are
distributed across consumption sectors.
TRANSPORTATION ENERGY DATA BOOK: EDITION 23—2003
11–5