What is Ozone Layer?

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The recent United Nations report, Scientific Assessment of Ozone Depletion: 2022 said that the Earth’s ozone layer is slowly recovering.

Why in news?

  • The successful phasing out of banned substances as envisioned by the Montreal Protocol has set the stage for a complete recovery of the ozone layer by the 2060s, a United Nations-backed panel of experts said at the American Meteorological Society’s annual meeting on January 8, 2023.


What is Ozone?

  • Ozone is a gas composed of three atoms of oxygen. It is both a natural and a man-made product that occurs in the Earth's upper atmosphere (Stratospheric ozone) and lower atmosphere (the troposphere).
  • Stratospheric ozone is formed naturally through the interaction of solar ultraviolet (UV) radiation with molecular oxygen (O2).
  • The "ozone layer," approximately 6 to 30 miles above the Earth's surface, reduces the amount of harmful UV radiation reaching the Earth's surface.


Q1) What is a stratosphere?

Stratosphere is a layer of Earth’s atmosphere lying between the troposphere and the mesosphere.

Source: The Earth’s ozone layer is slowly recovering