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To: Ben Ficklin

There has always been smog. That is why the Smokey Mountain are called smokey. And, that was before there was industrialization.


19 posted on 05/23/2015 10:57:35 AM PDT by Parmy
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To: Parmy
It is NOx that comes out of a tailpipe or a smoke stack that reacts with VOCs, in the presence of sunlight, to create ground level ozone.
20 posted on 05/23/2015 11:51:04 AM PDT by Ben Ficklin
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