Pollution in the _______ will have the greatest effect on human health.
a.
troposphere
b.
stratosphere
c.
mesosphere
d.
thermosphere
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Asked 5/8/2016 2:08:18 PM
Updated 5/9/2016 12:20:51 AM
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Edited by
jeifunk [5/9/2016 12:20:24 AM], Confirmed by
jeifunk [5/9/2016 12:20:51 AM]
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