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Physics 17 Online
OpenStudy (anonymous):

Whats is the most significate source of air pollution? A. lawn mowers B. acid rain c.airplanes and boats d. automobile emmissio0ns

OpenStudy (anonymous):

"Sulfur oxides (SOx) ...most significate source of air pollution" http://en.wikipedia.org/wiki/Air_pollution

OpenStudy (anonymous):

D

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