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Ozone hole refers to

  • A.Decrease in the thickness of ozone layer in stratosphere
  • B.Increase in thickness of ozone layer
  • C.Decrease in the ozone layer in troposphere
  • D.Hole in the ozone layer

Answer: A

The ozone hole is a thinning of the ozone layer in the stratosphere.

It is not a literal hole but a seasonal depletion, worst over Antarctica in the southern spring, where chlorine radicals released from CFCs destroy ozone catalytically on the surfaces of polar stratospheric clouds. One chlorine atom can destroy many thousands of ozone molecules before it is removed.

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