Question

Difference between pure air and populated air

Answer 1

pure air is the fresh air available in the country side.
populated air is the air available in the populated areas

Answer 2

Air is mixture of gases:-

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◉Pure air contains 78% Nitrogen 21% Oxygen and small but definite amount of carbon dioxide,argon,methane,water vapour,ozone etc.

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◉When the air is contaminated by unwanted substance which have a harmful effect on both living and non living thing it is called polluted air.

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