Depletion of ozone layer - class-X

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Multiple Choice

Greenhouse effect is due to

  1. accumulation of $ { O } _{ 3 } $ and depletion of $ { CO } _{ 2 } $
  2. accumulation of both $ { O } _{ 3 } $ and $ { CO } _{ 2 } $
  3. accumulation of $ { CO } _{ 2 } $ and depletion of $ { O } _{ 3 } $
  4. presence of green plants on the Earth.
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