A substance that enters Earth's cycles and does harm to living things is
A. a pollutant.
B. freshwater.
C. oxygen.
D. hydrogen.
A substance that enters Earth's cycles and does harm to living things is a pollutant.
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Asked 5/17/2014 1:04:31 PM
Updated 5/17/2014 1:25:58 PM
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alfred123 [5/17/2014 1:25:58 PM]
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