Multiple choice

Which of the following is an example of secondary air pollutants?

  1. Water vapour

  2. Aerosol

  3. Ground-level ozone

  4. Carbon monoxide
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Secondary pollutants are not emitted directly. Rather they form in the air when primary pollutants react or interact. An important example of secondary pollutants is ground-level ozone, one of the many secondary pollutants that make up the photochemical smog.

Keep practicing — related questions