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A comment on 25% of Cars Cause 90% of Automobile Air Pollution. Parent comment

Re:25% of Cars Cause 90% of Automobile Air Pollution by seanflyon on Thursday May 07, 2015 @02:30PM (#9507198)
Sulfur compounds are one kind of air pollution. No one is saying that sulfur doesn't count, they are saying that other things count too.
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