IAS Gyan

Daily News Analysis


11th January, 2023 Geography

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  • The Earth’s protective ozone layer is on track to recover within four decades, closing an ozone hole that was first noticed in the 1980s, a United Nations-backed panel of experts announced.

Read A to Z about Ozone in this Article: https://www.iasgyan.in/daily-current-affairs/ozone

Findings of the United Nations Report:

  • Global emissions of the banned chemical chlorofluorocarbon-11, or CFC-11, which was used as a refrigerant and in insulating foams, have declined since 2018 after increasing unexpectedly for several years.
  • The report also found that the ozone-depleting chemical chlorine declined 11.5% in the stratosphere since it peaked in 1993, while bromine declined 14.5% since it peaked in 1999.
  • If current policies remain in place, the ozone layer is expected to recover to 1980 levels — before the appearance of the ozone hole — by 2040, and will return to normal in the Arctic by 2045. Additionally, Antarctica could experience normal levels by 2066.