Lung cancer & DNA breakage are the major ill effects of excessive ozone exposure to human beings. Ozone layer depletion in the atmosphere is mainly caused by the presence of________________?
Correct answer: D. CFC (chloro fluoro carbon)
- A. CO2
- B. SO2
- C. Hydrocarbons
- D. CFC (chloro fluoro carbon)
Explanation
CFCs release chlorine radicals in the stratosphere, and these radicals catalytically destroy ozone. Carbon dioxide contributes to warming, but it is not the principal cause of stratospheric ozone depletion.
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