Any substance in air that could, in high enough concentration, harm animals, humans, vegetation, and/or materials are called:
A
dust particles
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B
air pollutants
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C
impurity in air
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D
none of above
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Solution
The correct option is D air pollutants Any substance in air that could, in high enough concentration, harm animals, humans, vegetation, and/or materials are called air pollutants. Examples are carbon monoxide, nitrogen dioxide etc.