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

Re:25% of Cars Cause 90% of Automobile Air Pollution by shaunrussell on Thursday May 07, 2015 @10:52AM (#9505451)
I'd like to see a study like this about airplanes, tractor trailers, and container ships.
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Re:25% of Cars Cause 90% of Automobile Air Pollution by csours on Thursday May 07, 2015 @01:22PM (#9506708)
Add lawn and garden tools.

https://www.google.com/search?q=small+engine+polution

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