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Acknowledgments US Department of Transportation - BTS

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Table 4-50: Estimated National Emissions <strong>of</strong> Sulfur Dioxide (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 31.22 28.04 25.93 23.31 23.08 22.38 22.08 21.77 21.35 18.62 18.39 18.84 18.94 17.55 16.35 15.93 14.77 14.71 14.65 14.59 13.12 11.65 10.18 8.42 7.94 8.06Highway vehicles 0.27 0.33 0.39 0.46 0.50 0.47 0.44 0.40 0.37 0.34 0.30 0.30 0.30 0.30 0.26 0.25 0.25 0.21 0.18 0.15 0.11 0.08 0.04 0.04 0.04 0.03Off-Highway 0.28 0.30 0.32 0.35 0.37 0.38 0.39 0.39 0.40 0.41 0.41 0.42 0.43 0.48 0.44 0.44 0.51 0.62 0.73 0.83 0.63 0.42 0.22 0.19 0.17 0.14Fuel combustion 23.46 22.66 21.39 20.02 20.29 19.80 19.49 19.25 18.89 16.23 16.25 16.65 16.74 15.34 14.16 13.74 12.80 12.69 12.58 12.47 11.34 10.20 9.06 7.32 6.87 7.01Industrial processes a 7.09 4.68 3.77 2.43 1.86 1.68 1.72 1.65 1.62 1.59 1.37 1.43 1.43 1.33 1.38 1.43 1.06 1.04 1.01 0.99 0.91 0.84 0.76 0.77 0.77 0.77Waste disposal and recycling 0.01 0.05 0.03 0.03 0.04 0.04 0.04 0.07 0.06 0.05 0.03 0.03 0.03 0.03 0.03 0.03 0.03 0.03 0.03 0.03 0.03 0.03 0.03 0.03 0.03 0.03Miscellaneous 0.11 0.02 0.01 0.01 0.01 0.01 0.01 0.01 0.02 0.01 0.02 0.01 0.01 0.07 0.07 0.04 (R) 0.13 0.13 0.13 0.13 0.11 0.09 0.07 0.07 0.08 0.08KEY: R = revised.aIndustrial processes consists <strong>of</strong> chemical and allied product manufacturing, metals processing, petroleum and related industries, and other industrialprocesses; solvent utilization; and 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. 15, 2011.

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