Selected National Air Pollutant Emissions: 1970 to 2005
(In thousands of tons, except as indicated.)
The amount of various pollutants emitted into the air has fallen significantly between 1970 and 2005.
|Pollutant||1970 (unless indicated)||2005|
|PM-10, misc.||37,736 (1985)||14,479|
|PM-2.5, misc.||5,233 (1990)||1,660|
|Volatile organic compounds||34,659||18,925|