Which one of the following is the main culprit in the thinning of Ozone layer in the earth's stratosphere?

  • A. Carbon dioxide
  • B. Chlorofluorocarbons
  • C. Nitrogen oxides
  • D. Methane

Explanation

Chlorofluorocarbons reach the stratosphere, where ultraviolet radiation releases chlorine atoms that catalytically destroy ozone. Carbon dioxide and methane mainly contribute to warming rather than being the principal cause of ozone thinning.

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