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Pollution and Its Types

Why do you th...

Question

Why do you think the policeman wear a mask in a traffic ?

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Solution

Policeman wear mask in traffic because to avoid breathing of air pollutants and harmful gases emitted from vehicles and thus prevent themselves from air pollution.

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Q. A traffic policeman always wears a mask on his nose. Why?

Q.  Why do policemen regulating traffic at a crowded crossing often wear a mask?

Statement I: Policemen regulating traffic at a crowded crossing often wear a mask.

Statement II: Mask filters carbon dioxide and sends pure oxygen inside.

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