Ozone depletion was first noticed over Antarctica in:

A ) 1970s

B ) 1980 s ✅

C ) 1990s

D ) 1960 s

Related Questions
  1. Ozone has a smell:
  2. The recombination of O and O2 in mid stratosphere is an:
  3. Ozone layer is found in:
  4. Ozone is an allotropic form of:
  5. Which is not poisonous gas?
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