When is air said to be polluted?

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Solution

Air is said to be polluted when the composition of different gases in the air is dramatically altered. Moreover, addition of gases that are not normally found in the air also leads to air pollution.

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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.

When the air is compressed, it is said to be

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