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OpenStudy (tanya123):

- Why are naturally occurring substances, such as particulates or carbon dioxide, sometimes considered pollutants?

OpenStudy (anonymous):

Air pollution & higher carbon dioxide emissions go hand-in-hand,intensifying global warming and the number of smog-related deaths.

OpenStudy (tanya123):

thank you @some_someone !!

OpenStudy (anonymous):

yw :)

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