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A substance that enters Earth's cycles and does harm to living things is a. a pollutant. b. hydrogen. c. freshwater. d. oxygen.

A substance that enters Earth's cycles and does harm to living things is a. a pollutant. b. hydrogen. c. freshwater. d. oxygen.
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1 vote
A substance that enters Earth's cycles and does harm to living things is

a. a pollutant.
b. hydrogen.
c. freshwater.
d. oxygen.

asked
User Deqyra
by
9.3k points

2 Answers

3 votes

............a pollutant...

answered
User Josh Zwiebel
by
7.8k points
6 votes
A pollutant because hyrdogen, freshwater and oxygen are all substances in which don't harm the earth's cycles
answered
User Giovanni Cerretani
by
8.8k points
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