Q. Which of the following is not regarded as a pollutant?
A) $NO_{2}$
B) ${CO}_{2}$
C) $O_{3}$
D) Hydrocarbons
Explanation
(b)
Carbon dioxide, being limiting factor, when present in small amount $(ie,\ 0.033\%)$, has no adverse effect but when its concentration is slightly higher than 0.033%, it has an adverse effect on our climate. Thus, in normal conditions, $CO_{2}$ is not regarded as a pollutant
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.