Emissions of Greenhouse Gases in the United States 1997 - Table 23. U.S. Nitrous Oxide Emissions from Mobile Sources, 1990-1998

Table 23. U.S. Nitrous Oxide Emissions from Mobile Sources, 1990-1998
(Thousand Metric Tons of Nitrous Oxide)

Item	1990	1991	1992	1993	1994	1995	1996	1997	P1998
Motor Vehicles
Passenger Cars	99	107	115	112	111	108	109	109	109
Buses	*	*	*	*	*	*	*	*	*
Motorcycles	*	*	*	*	*	*	*	*	*
Light-Duty Trucks	49	51	53	64	79	94	88	91	93
Other Trucks	6	6	6	6	7	7	7	8	8
Total	154	164	174	183	197	210	205	208	210
Other Mobile Sources	12	12	12	12	12	12	13	12	12
Total Mobile Sources	166	176	186	195	209	222	217	220	222
Less than 500 metric tons of nitrous oxide. P = preliminary data. Notes: Data in this table are revised from the data contained in the previous EIA report, Emissions of Greenhouse Gases in the United States 1997, DOE/EIA-0573(97) (Washington, DC, October 1998). Totals may not equal sum of components due to independent rounding. Sources: Calculations based on vehicle miles traveled from U.S. Department of Transportation, Federal Highway Statistics* (various years), Table VM-1. Passenger car and light-duty truck emissions coefficients from U.S. Environmental Protection Agency, Office of Air and Radiation, Emissions of Nitrous Oxide From Highway Mobile Sources: Comments on the Draft Inventory of U.S. Greenhouse Gas Emissions and Sinks, 1990-1996, EPA-420-R-98-009 (Washington DC, August 1998). Intergovernmental Panel on Climate Change, Greenhouse Gas Inventory Reference Manual: Revised 1996 IPCC Guidelines for National Greenhouse Gas Inventories, Vol. 3 (Paris, France, 1997), pp. 1.64-1.68, web site www.iea.org/ipcc/invs6.htm.