A substance that enters Earth's cycles and does harm to living things is?

Question

A. A pollutant.
B. Freshwater.
C. Hydrogen.
D. Oxygen.

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Answer 1 · 2015-08-31T20:56:46

A pollutant.

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A pollutant is any substance that renders the air, soil, water, or other natural resource harmful or unsuitable for a specific purpose.

Industrial activities can be a major source of air and water pollution.

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