Table 4-44:  Estimated National Emissions of Particulate Matter (PM-2.5)a (Million short tons),,,,,,,,,,,,,,,,,,
,1990,1991,1992,1993,1994,1995,1996,1997,1998,1999,2000,2001,(R) 2002,(R) 2003,(R) 2004,(R) 2005,(R) 2006,2007
Total,7.56,7.32,7.20,7.15,7.54,6.93,6.73,6.26,6.26,6.40,6.50,6.22,3.102,3.095,3.089,3.082,2.998,2.958
Highway vehicles,0.32,0.31,0.29,0.28,0.26,0.25,0.23,0.22,0.20,0.18,0.17,0.16,0.15,0.14,0.14,0.13,0.11,0.10
Off-Highway,0.30,0.30,0.31,0.31,0.31,0.31,0.31,0.31,0.30,0.31,0.30,0.29,0.29,0.29,0.29,0.29,0.26,0.25
Fuel combustion,0.91,0.89,0.93,0.85,0.84,0.90,0.67,0.67,0.63,0.67,0.72,0.74,0.29,0.29,0.29,0.29,0.25,0.22
Industrial processesb,0.56,0.57,0.58,0.50,0.50,0.50,0.37,0.38,0.39,0.30,0.31,0.32,0.36,0.36,0.36,0.36,0.36,0.35
Waste disposal and recycling,0.23,0.24,0.24,0.29,0.27,0.25,0.43,0.44,0.46,0.44,0.33,0.33,0.22,0.22,0.22,0.22,0.22,0.22
Miscellaneous,5.23,5.00,4.85,4.93,5.36,4.73,4.72,4.24,4.28,4.50,4.68,4.38,1.80,1.80,1.80,1.80,1.81,1.82
Key: R = revised. ,,,,,,,,,,,,,,,,,,
,,,,,,,,,,,,,,,,,,
a Particulate matter less than 2.5 microns in size. Data include PM without condensibles,,,,,,,,,,,,,,,,,,
"b  Industrial processes consists of chemical and allied product manufacturing, metals processing, petroleum and related industries, and other industrial processes; solvent utilization; and storage and transportation.",,,,,,,,,,,,,,,,,,
,,,,,,,,,,,,,,,,,,
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 December 2008.",,,,,,,,,,,,,,,,,,
,,,,,,,,,,,,,,,,,,
,,,,,,,,,,,,,,,,,,








,,,,,,,,,,,,,,,,,,
,,,,,,,,,,,,,,,,,,
,,,,,,,,,,,,,,,,,,
,,,,,,,,,,,,,,,,,,
,,,,,,,,,,,,,,,,,,
,,,,,,,,,,,,,,,,,,
,,,,,,,,,,,,,,,,,,