Causes:
· - Majority is from factories
· -Car emissions is next greatest source
· -Sulfur dioxide and nitrogen oxides combine to form the acidic mixture
· -The sulfur dioxide is trapped in the fossil fuels and released when burned
-Atmosphere can neutralize the mixture but sometimes there too much of it· -Can fall as wet or dry
· -Wet disposition is rain, fog, snow and sleet
· -Dry disposition is acidic acids and dust particles
· - The acid gases or rain can cover hundreds of miles
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