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Question

Ozone hole was first detected over
  1. Arctic circle
  2. Antartica
  3. Equator
  4. All of these

A
Arctic circle
B
All of these
C
Equator
D
Antartica
Solution
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A severe depletion of ozone (ozone hole) in a region of the ozone layer was found particularly over Antarctica The depletion is caused by chlorofluorocarbons and by other compounds like CCI4, CF4 etc.

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