Question

Example of a secondary pollutant is:

• A. CFCS's
• B. $\text{CH}_4$
• C. PAN
• D. CO

Hint:

Primary Pollutants $\rightarrow$ Emitted directly ($\text{CO}$, $\text{CH}_4$, $\text{SO}_2$, $\text{CFCs}$).
Secondary Pollutants $\rightarrow$ Formed in the air via chemical reactions ($\text{O}_3$, $\text{PAN}$, Acid Rain).

Answer 1

The Correct Option is C