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Biodiversity, Conservation and Environmental Issues — BIOLOGY STD 12 Science — Question

Maharashtra BoardEnglish MediumSTD 12 ScienceBIOLOGYBiodiversity, Conservation and Environmental Issues4 Marks
Question
‘There is a hole in the ozone layer.’ What do you understand by this ?
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Answer

  1. The area in Antarctica region with a thin ozone layer is known as ozone hole.
  2. $ \text{CFCs }($chlorofluorocarbons$)$ which $-$are widely used as refrigerants disturb the balance between the production and degradation of ozone.
  3. Ultraviolet $(UV)$ rays and chlorofluorocarbons $ \text{(CFCs)}$ release chlorine $(Cl^–)$ ions which act as catalyst in the degradation of ozone layer.
  4. Chloride ions also degrade the ozone layer.
  5. The degradation of ozone layer results in the depletion of ozone causing a hole in the ozone layer.

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