Pollution Effects · Botany

Which pollutant is most associated with the thinning of the stratospheric ozone layer?

  1. Carbon dioxide only
  2. Oxygen gas
  3. Water vapor from transpiration
  4. Chlorofluorocarbons
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Correct answer: Chlorofluorocarbons

Chlorofluorocarbons release chlorine atoms in the stratosphere, which break down ozone molecules. Ozone layer depletion increases harmful ultraviolet radiation reaching Earth.

Difficulty: Medium Question 11 of 20

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