1. A substance that enters Earth's cycles and does harm to living things is A. a pollutant. B. oxygen. C. freshwater. D. hydrogen.
A substance that enters Earth's cycles and does harm to living things is a pollutant.
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Asked 10/1/2018 2:41:53 PM
Updated 11/15/2019 9:28:18 AM
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alfred123 [11/15/2019 9:28:18 AM]
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