EDEN IAS

THE OZONE HOLE OVER

UPSC CURRENT AFFAIRS | THE OZONE HOLE OVER THE TROPICS | 08TH JULY |

SYLLABUS SECTION: GS III (ENVIRONMENT AND ECOLOGY)

WHY IN THE NEWS?

Recently, scientists revealed a large, all-season ozone hole in the lower stratosphere over the tropics,

Comparable in depth to that of the well-known springtime Antarctic hole, but roughly seven times greater in area.

  • All-season ozone hole is define as an area of ozone loss larger than 25% compare with the undisturb atmosphere.

MORE DETAILS:

  • Ozone (O3) layer is a high ozone concentration region in the stratosphere, protecting life on earth by absorbing harmful ultraviolet radiations from the sun.
  • Thinning of the ozone layer was confirmed in 1985 through the formation of the ozone hole over the Antarctic during the Southern Hemisphere spring.
  • Release of certain chemicals e.g., chlorine and bromine, chlorofluorocarbons (CFCs), halons, and carbon tetrachloride.

INITIATIVES TO PROTECT OZONE LAYER

  • Vienna Convention on Protection of Ozone Layer 1985:
  • The Convention aimed to promote cooperation among nations by exchanging information on the effects of human activities on the ozone layer.
  • The Montreal Protocol, 1987:
  • The Montreal Protocol is an international treaty designed to protect the ozone layer by phasing out the production of numerous substances that are responsible for ozone depletion.
  • The Kigali Agreement (adopted in 2016 and entered into force in 2019), provided a path to achieve an 80% reduction in HFCs (not ozone-depleting but have high global warming potential) consumption by 2047
IMPACT OF OZONE LAYER DEPLETION
  • Increases ground-level UV radiation,
  • Increasing the risk of skin cancer and cataracts in humans,
  • Weakening human immune systems,
  • Decrease agricultural productivity
  • Affects terrestrial and aquatic biogeochemical cycles.

Read more: UPSC CURRENT AFFAIRS

SOURCE: BUSINESS STANDARD

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