Question

what could cause impure air?

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Answer 1

Ans= Air pollution both indoor or outdoor is always a serious threat to the environmental health problem. Air that has the presence of pollutants like nitrogen oxides (NOX), sulfur dioxide (SO2), ozone (O3) and particle substances (PM) makes it impure and hazardous to health.

Answer 2

Answer:

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Air pollution both indoor or outdoor is always a serious threat to the environmental health problem. ... Air that has the presence of pollutants like nitrogen oxides (NOX), sulfur dioxide (SO2), ozone (O3) and particle substances (PM) makes it impure and hazardous to health.