Ozone Layer is recovering


What is Important?
UPSC perspective:
Prelims :Highlights
Mains :Way to Prevent


Why in News?

A UN study has shown that the ozone layer is recovering at a rate of 1-3% per decade.

About Ozone Layer:

The Ozone layer or ozone shield is a region of Earth's stratosphere that absorbs most of the Sun's ultraviolet radiation. It contains high concentrations of ozone (O3) in relation to other parts of the atmosphere, although still small in relation to other gases in the stratosphere.

Highlights:

*A recent study by NASA has confirmed the recovery of the ozone layer due to the absence of chlorine from Chlorofluorocarbon(CFC) in the atmosphere.
*The study shows that years of dangerous depletion caused by the release of harmful chemicals is being reversed.
*The stratospheric ozone layer protects life on earth from harmful UV radiation.
*It prevents damage to the earth’s ecosystems and provides protection against skin cancer.
*The Antarctic ozone hole is recovering, while continuing to occur every year.
*It said the Antarctic ozone hole is expected to gradually close, returning to 1980 levels in the 2060s.
*Northern Hemisphere and mid-latitude ozone is scheduled to heal completely by the 2030s followed by the Southern Hemisphere in the 2050s and polar regions by 2060.
*However, while most of the banned gases have been phased out,an unexpected increase in production and emissions of CFC-11 from eastern Asia since 2012.
*If CFC-11 emissions continued at the same rate, return of mid-latitude and polar ozone-depleting chemicals to their 1980 values would be delayed by about seven and 20 years, respectively.







Ozone Layer is recovering Ozone Layer is recovering Reviewed by The Hindu Current Affairs on November 06, 2018 Rating: 5

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