Emissions of Greenhouse Gases in the United States 1997 - Table 26. U.S. Nitrous Oxide Emissions from Solid Waste of Domesticated Animals, 1990-1998

Table 26. U.S. Nitrous Oxide Emissions from Solid Waste of Domesticated Animals, 1990-1998
(Thousand Metric Tons of Nitrous Oxide)

Source	1990	1991	1992	1993	1994	1995	1996	1997	P1998
Cattle	215	217	219	223	226	228	225	221	218
Swine	5	5	5	5	6	6	5	6	6
Poultry	3	3	3	4	4	4	4	4	4
Sheep	3	3	3	3	3	3	3	2	2
Goats	1	1	1	1	1	1	1	1	1
Horses	1	1	1	1	1	1	1	1	1
Total	229	231	234	238	241	243	239	235	233
P = preliminary data. Notes: Totals may not equal sum of components due to independent rounding. Sources: Estimates presented in this chapter. Nitrogen content of waste by species, manure management systems, and emissions coefficients from 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. 4.89-4.107, web site www.iea.org/ipcc/invs6.htm. Animal populations from U.S. Department of Agriculture, National Agricultural Statistics Service, web site www.mannlib.usda.edu.