Figure 5-14 CO2 GHG Emissions by Mode: 1990–2012
Metric tons CO2 (millions)
| Passenger cars | Light-duty trucks | Medium- and Heavy- trucks | Buses | Aircraft | Ships and boats | Rail | Other | Total, all modes | |
|---|---|---|---|---|---|---|---|---|---|
| 1990 | 629.3 | 321.1 | 230.1 | 8.4 | 187.4 | 44.5 | 38.5 | 49.5 | 1,508.8 |
| 1991 | 587.9 | 347.6 | 225.3 | 7.7 | 171.7 | 39.5 | 36.4 | 45.2 | 1,461.3 |
| 1992 | 595.3 | 371.9 | 235.4 | 8.1 | 169.5 | 54.3 | 37.3 | 44.7 | 1,516.5 |
| 1993 | 604.5 | 386.1 | 248.0 | 8.8 | 170.8 | 46.9 | 38.4 | 46.9 | 1,550.4 |
| 1994 | 607.1 | 393.3 | 264.2 | 9.2 | 178.1 | 47.5 | 41.2 | 50.8 | 1,591.4 |
| 1995 | 606.8 | 406.4 | 274.8 | 9.2 | 174.9 | 57.7 | 42.7 | 51.3 | 1,623.8 |
| 1996 | 614.8 | 421.2 | 286.7 | 9.6 | 187.2 | 53.6 | 43.4 | 51.6 | 1,668.1 |
| 1997 | 614.2 | 435.4 | 300.8 | 9.8 | 187.2 | 39.1 | 43.6 | 54.6 | 1,684.7 |
| 1998 | 633.9 | 446.7 | 313.9 | 10.1 | 190.8 | 33.1 | 43.9 | 48.9 | 1,721.3 |
| 1999 | 647.3 | 466.9 | 331.4 | 11.3 | 195.1 | 29.1 | 45.5 | 49.6 | 1,776.2 |
| 2000 | 644.2 | 467.0 | 345.8 | 11.1 | 197.5 | 60.0 | 45.6 | 49.1 | 1,820.3 |
| 2001 | 650.0 | 472.3 | 344.4 | 10.1 | 192.1 | 42.0 | 45.9 | 47.2 | 1,804.0 |
| 2002 | 663.8 | 484.5 | 358.1 | 9.8 | 187.6 | 46.8 | 45.4 | 49.0 | 1,845.0 |
| 2003 | 643.3 | 520.3 | 354.4 | 10.6 | 181.4 | 36.8 | 47.1 | 44.2 | 1,838.1 |
| 2004 | 641.6 | 542.7 | 365.6 | 14.8 | 188.8 | 39.6 | 49.7 | 43.0 | 1,885.8 |
| 2005 | 662.3 | 505.9 | 396.0 | 11.8 | 191.8 | 44.5 | 50.3 | 44.0 | 1,906.6 |
| 2006 | 639.1 | 519.5 | 406.1 | 12.0 | 184.6 | 47.7 | 52.4 | 44.1 | 1,905.5 |
| 2007 | 804.4 | 330.1 | 431.6 | 17.6 | 181.7 | 54.4 | 51.6 | 48.7 | 1,920.1 |
| 2008 | 769.3 | 312.8 | 413.9 | 17.0 | 175.1 | 45.2 | 47.9 | 49.5 | 1,830.7 |
| 2009 | 766.0 | 317.4 | 376.3 | 16.1 | 155.9 | 38.7 | 40.7 | 49.4 | 1,760.5 |
| 2010 | 763.7 | 317.6 | 390.0 | 15.9 | 153.4 | 44.6 | 43.5 | 50.4 | 1,779.1 |
| 2011 | 760.1 | 303.8 | 389.6 | 17.0 | 148.5 | 46.3 | 45.3 | 50.5 | 1,761.1 |
| 2012 | 759.8 | 301.2 | 390.6 | 18.2 | 145.1 | 40.1 | 44.1 | 52.6 | 1,751.7 |
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). CO2 emissions from the individual modes of other, rail, ships and boats, and aircraft include a portion of total CO2 emissions due to passenger travel since passenger travel could not be segregated from total CO2 emissions. The U.S. Environmental Protection Agency (EPA) changed the definitions of passenger cars and light trucks in 2007. Many vehicles formerly classified as light trucks, but designated predominantly for passenger transportation, were reclassified as passenger cars, causing an apparent jump in passenger car emissions that were offset by a compensating drop in light truck emissions.
SOURCE: U.S. Environmental Protection Agency, Inventory of U.S. Greenhouse Gas Emissions and Sinks (2012), table 2-15, available at http://epa.gov/climatechange/emissions/usinventoryreport.html as of March 2015.