Multiple choice

Ozone depletion in the atmosphere is mainly caused by

  1. Sulphur dioxide

  2. Nitrogen dioxide

  3. Hydrogen sulphide

  4. Chlorofluorocarbon

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Chlorofluorocarbons (CFCs) release chlorine atoms in the stratosphere that catalytically destroy ozone molecules. A single chlorine atom can destroy thousands of ozone molecules, making CFCs the primary cause of ozone depletion.