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Troyanec [42]
3 years ago
14

Dirty or harmful substances in the environment?

Biology
1 answer:
alexira [117]3 years ago
3 0

Answer:

pollution

Explanation:

Pollution is the introduction of harmful materials into the environment. These harmful materials are called pollutants. Pollutants can be natural, such as volcanic ash. They can also be created by human activity, such as trash or runoff produced by factories.

Hope it helps!

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