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Which of the following is a secondary pollutant

A. CO2

B. CO

C. O3

D. SO2

Answer: Option C

Solution(By Examveda Team)

Secondary pollutants are not emitted directly. They are formed from the combination of primary pollutants with some other compound. Examples of secondary pollutants are Ozone, Formaldehyde, PAN (peroxy acetyl nitrate) and Smog etc.

This Question Belongs to General Knowledge >> Environmental Science

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