Multiple choice

Components other than the normal ones in atmosphere air lead to __________ of atmosphere which is harmful to us.

  1. cooling

  2. saturation

  3. pollution

  4. mixing
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

When abnormal or excessive components enter the atmosphere beyond normal composition, it results in air pollution which is harmful to human health and the environment. Pollution refers to the presence of harmful substances in the air.

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