Ozone hole is a region over:

  1. A. the Antarctic caused mainly by CFC gases.
  2. B. the Antarctic caused mainly by carbon di-oxide gas.
  3. C. the Arctic caused mainly by CFC gases.
  4. D. the Arctic caused mainly by carbon dioxide gas.

Correct Answer: A. the Antarctic caused mainly by CFC gases.

Explanation

The ozone hole is most prominent over Antarctica and is primarily caused by chemical reactions involving Chlorofluorocarbons (CFCs)[cite: 1].

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