Q. Which of the following is not an air pollutant?
A) $NO_{3}$
B) $SO_{2}$
C) Hydrocarbons
D) $CO_{2}$
Explanation
$CO_{2}$ is normally not an air pollutant. It is necessary for photosynthesis. Its rise has been due to large scale deforestation and large scale combustion of fossil fuels. When $CO_{2}$goes to high concentration, it causes global warming.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.