Question

how is fog caused ? How does it form smog

Answer 1

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When cold air passes over warmer water or moist land , it results in formation of Fog.

When Fog mixes with smoke, it forms Smog.


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Answer 2

Explanation:

When cold air passes over warmer water or moist land , it results in formation of Fog.

When Fog mixes with smoke, it forms Smog..