Multiple choice general knowledge science & technology

Which one of the following is responsible for the depletion of ozone layer?

  1. chloroflurocarbons

  2. methane

  3. PAN

  4. sulphur oxide
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A Correct answer
Explanation

Chlorofluorocarbons (CFCs) are the primary cause of ozone layer depletion. When CFCs reach the stratosphere, UV radiation breaks them apart, releasing chlorine atoms that catalytically destroy ozone molecules. Methane is a greenhouse gas, PAN is a secondary pollutant, and sulfur oxides cause acid rain.

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