US Air Pollution from
Autos & Light Trucks: 1970-1999

Factor 1970 1999 Change
       
GROSS EMISSIONS (Million Short Tons)    
Carbon Monoxide 79.60 43.50 -45.4%
Nitrogen Oxides 5.54 4.50 -18.8%
Volitile Organic Compounds 11.96 4.60 -61.5%
Particulate Matter (PM-10) 0.30 0.10 -67.8%
Particulate Matter (PM-2.5) 0.06 0.06 -3.4%
Lead 0.17 0.00 -100.0%
Average     -42.4%
       
EMISSIONS PER BILLION VEHICLE MILES    
Vehicle Miles (Billion) 1,043.0 2,470.4 136.9%
Carbon Monoxide 76.32 17.61 -76.9%
Nitrogen Oxides 5.31 1.82 -65.7%
Volitile Organic Compounds 11.47 1.86 -83.8%
Particulate Matter (PM-10) 0.28 0.04 -86.4%
Particulate Matter (PM-2.5) 0.06 0.02 -59.2%
Lead 0.16 0.00 -100.0%
Average     -78.7%
       
EMISSIONS PER 1,000 POPULATION    
Population (000,000) 209.9 272.7 29.9%
Carbon Monoxide 379.2 159.5 -57.9%
Nitrogen Oxides 26.4 16.5 -37.5%
Volitile Organic Compounds 57.0 16.9 -70.4%
Particulate Matter (PM-10) 1.4 0.3 -75.2%
Particulate Matter (PM-2.5) 0.3 0.2 -25.7%
Lead 0.8 0.0 -100.0%
Average     -61.1%
       
Source: Transportation Energy Data Book (Edition 21), September 2001

(c) 2001 www.publicpurpose.com --- Wendell Cox Consultancy --- Permission granted to use with attribution.
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