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Acknowledgments US Department of Transportation - BTS

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Table 4-45: Estimated National Emissions <strong>of</strong> Carbon Monoxide (Million short tons)1970 1975 1980 1985 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 (R) 2006 (R) 2007 (R) 2008 (R) 2009 (R) 2010 2011TOTAL all sources 204.04 188.40 185.41 176.84 154.19 147.13 140.90 135.90 133.56 126.78 128.86 117.91 115.38 114.54 114.47 106.26 111.06 105.05 99.04 93.03 88.20 83.37 78.54 73.16 67.79 62.42Highway vehicles 163.23 153.56 143.83 134.19 110.26 104.98 99.71 94.43 89.16 83.88 78.61 75.85 73.24 68.71 68.06 63.48 60.60 56.58 52.56 48.54 45.91 43.27 40.63 38.12 35.61 33.09Off-Highway 11.37 14.33 16.69 19.03 21.45 21.93 22.42 22.90 23.39 23.87 24.36 23.67 23.69 23.32 24.18 24.68 22.66 22.00 21.34 20.67 19.84 19.01 18.19 13.95 9.71 5.47Fuel combustion 4.63 4.48 7.30 8.49 5.51 5.86 6.15 5.59 5.52 5.93 4.34 4.33 4.33 5.54 4.78 4.83 5.47 5.36 5.24 5.12 4.90 4.68 4.46 4.56 4.67 4.77Industrial processes a 9.84 7.54 6.95 5.28 4.77 4.62 4.55 4.65 4.61 4.61 3.64 3.80 3.81 2.55 2.63 2.76 2.24 2.17 2.10 2.03 1.93 1.83 1.74 1.80 1.86 1.93Waste disposal and recycling 7.06 3.23 2.30 1.94 1.08 1.12 1.14 1.25 1.23 1.19 2.90 2.95 3.12 3.02 1.85 1.85 1.59 1.58 1.57 1.55 1.56 1.57 1.58 1.57 1.56 1.56Miscellaneous 7.91 5.26 8.34 7.93 11.12 8.62 6.93 7.08 9.66 7.30 15.02 7.32 7.18 11.41 12.96 8.68 18.49 17.36 16.23 15.11 14.05 13.00 11.94 13.16 14.38 15.60KEY: R = revised.aIndustrial processes consists <strong>of</strong> chemical and allied product manufacturing, metals processing, petroleum and related industries, other industrial processes; andsolvent utilization, storage, and transport.NOTEDetails may not add up to totals due to rounding in the source.SOURCEU.S. Environmental Protection Agency, Clearinghouse for Inventories and Emissions Factors (CHIEF), Current Emission Trends Summaries, available athttp://www.epa.gov/ttn/chief/trends/index.html as <strong>of</strong> Nov. 14, 2011.

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