How is smog formed?

Smog is very dense fog, but contains no pollutants

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Smoke from factories and vehicle mixes with fog, forming smog.

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Smog is formed only during the summer due to the rain evaporating ata faster rate

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(a) and (b) above.

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Solution

The correct option is B Smoke from factories and vehicle mixes with fog, forming smog.
Smog is formed when smoke from factories and vehicle mixes with fog. It is usually seen in the morning.

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