Question

Which of the following is a criteria pollutant as per National Ambient Air Quality Standards?

• A. $CO_2$
• B. $NH_3$
• C. $CFCs$
• D. CO

Hint:

Criteria pollutants include CO, NOx, SO2, particulate matter, and others regulated for public health.

Answer 1

The Correct Option is D

1. Carbon monoxide (CO) is a criteria pollutant as it is toxic and can cause severe health effects by interfering with oxygen transport in blood.
2. Other options like CO₂ and CFCs are not listed under criteria pollutants in NAAQS.