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Survey Results - Archive Index
Air Pollution:
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The
Clean Air Act - 
Basic
Objectives Restated
The
Clean Air Act - Questions &
Answers
Health Effects: High concentrations of sulfur dioxide (SO2) can result in breathing problems with asthmatic children and adults who are active outdoors. Short-term exposure has been linked to wheezing, chest tightness and shortness of breath. Other effects associated with longer-term exposure to sulfur dioxide, in conjunction with high levels of particulate soot, include respiratory illness, alterations in the lungs' defenses and aggravation of existing cardiovascular disease.
Environmental Effects: Sulfur dioxide and nitrogen oxides are the major precursors of acid rain, which has acidified soils, lakes and streams, accelerated corrosion of buildings and monuments, and reduced visibility. Sulfur dioxide also is a major precursor of fine particulate soot, which poses a significant health threat.
Sources: Combustion of fuel containing sulfur -- mostly coal and oil. Also produced during metal smelting and other industrial processes.
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