When air is contaminated with ________ substances, then it is called air pollution.

harmful

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clean

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unwanted

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poisonous

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Solution

The correct options are
A harmful
C unwanted
D poisonous
When air is contaminated with unwanted substances, that can be harmful or poisonous, which have harmful effect on both living and non-living objects, it is considered to be air pollution.

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Similar questions

Question 1

(a) Is Air said to be polluted when it is contaminated with unwanted or foreign substances?

(b) Mention one man-made activity that leads to air pollution.

Contamination of air by unwanted substances is called ______.

The substances which contaminate air are called __________.

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