Ozone Layer Depletion – How the Large Hole in the Arctic Ozone Layer Closed
From Current Affairs Notes for UPSC » Editorials & In-depths » This topic
The U.N. World Meteorological Organization (WMO) recently declared that Ozone depletion over the Arctic though hit a "record level" in March (the biggest since 2011), the hole has now closed.
The ozone hole’s closing was due to a phenomenon called the polar vortex, and not because of reduced pollution levels due to Covid-19 lockdowns around the world.
What is the Ozone layer?
- The ozone layer is a region of the Earth's stratosphere that absorbs most of the Sun's harmful Ultraviolet (UV) radiation.
- In UV rays, the UV-B radiations are particularly harmful and majorly screened out by the ozone layer only.
- This layer protects the earth from Sun's harmful UV radiation by absorbing around
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