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Natural Resources — Science STD 9 — Question

CBSE BoardEnglish MediumSTD 9ScienceNatural Resources1 Mark
Question

Ozone hole was discovered in:

  1. 1992
  2. 1985
  3. 1995
  4. 1998
✓

Answer

  1. 1985

Explanation:

Ozone hole was discovered in 1985 over Antarctic by Joe Farman, Brian Gardiner and Jonathan Shanklin.

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