Table 4-41: Estimated National Emissions of Nitrogen Oxides
Wednesday, November 21, 2012
Table 4-41: Estimated National Emissions of Nitrogen Oxides
(Million short tons)
| 1970 | 1975 | 1980 | 1985 | 1990 | 1991 | 1992 | 1993 | 1994 | 1995 | 1996 | 1997 | 1998 | 1999 | 2000 | 2001 | 2002 | (R) 2003 | (R) 2004 | (R) 2005 | (R) 2006 | (R) 2007 | 2008 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| TOTAL | 26.88 | 26.38 | 27.08 | 25.76 | 25.53 | 25.18 | 25.26 | 25.36 | 25.35 | 24.96 | 24.79 | 24.71 | 24.35 | 22.84 | 22.60 | 21.55 | 21.14 | 20.46 | 19.79 | 19.12 | 18.11 | 17.32 | 16.34 |
| Highway vehicles | 12.62 | 12.06 | 11.49 | 10.93 | 9.59 | 9.45 | 9.31 | 9.16 | 9.02 | 8.88 | 8.73 | 8.79 | 8.62 | 8.37 | 8.39 | 7.77 | 7.87 | 7.41 | 6.95 | 6.49 | 6.06 | 5.64 | 5.21 |
| Off-Highway | 2.65 | 2.97 | 3.35 | 3.58 | 3.78 | 3.85 | 3.92 | 3.98 | 4.05 | 4.11 | 4.18 | 4.18 | 4.16 | 4.08 | 4.17 | 4.16 | 4.51 | 4.63 | 4.76 | 4.89 | 4.68 | 4.47 | 4.26 |
| Fuel combustion | 10.06 | 10.49 | 11.32 | 10.05 | 10.89 | 10.78 | 10.93 | 11.11 | 11.02 | 10.83 | 10.51 | 10.55 | 10.38 | 9.20 | 8.82 | 8.45 | 7.49 | 7.11 | 6.73 | 6.34 | 6.00 | 5.88 | 5.57 |
| Industrial processesa | 0.78 | 0.54 | 0.56 | 0.80 | 0.80 | 0.72 | 0.76 | 0.74 | 0.77 | 0.77 | 0.80 | 0.84 | 0.85 | 0.78 | 0.81 | 0.85 | 0.95 | 0.96 | 0.97 | 0.98 | 0.97 | 0.95 | 0.93 |
| Waste disposal and recycling | 0.44 | 0.16 | 0.11 | 0.09 | 0.09 | 0.10 | 0.10 | 0.12 | 0.11 | 0.10 | 0.15 | 0.16 | 0.16 | 0.16 | 0.13 | 0.13 | 0.11 | 0.12 | 0.13 | 0.15 | 0.14 | 0.13 | 0.12 |
| Miscellaneous | 0.33 | 0.17 | 0.25 | 0.31 | 0.37 | 0.29 | 0.26 | 0.24 | 0.39 | 0.27 | 0.41 | 0.19 | 0.18 | 0.25 | 0.28 | 0.18 | 0.21 | 0.23 | 0.25 | 0.27 | 0.27 | 0.26 | 0.26 |
KEY: R = revised.
a Industrial processes consists of chemical and allied product manufacturing, metals processing, petroleum and related industries, and other industrial processes; and solvent utilization, storage, and transport.
SOURCE
U.S. Environmental Protection Agency, Clearinghouse for Inventories and Emissions Factors (CHIEF), Current Emission Trends Summaries, available at http://www.epa.gov/ttn/chief/trends/index.html as of Jan. 19, 2010.