Hole in Earth’s Ozone layer over the Arctic has closed

Scientists have confirmed that the largest hole in Earth’s Ozone layer which was 1 million square kilometres wide over the Arctic has now healed itself.

How Stratospheric Ozone is formed ?

Stratospheric ozone is formed naturally by chemical reactions involving solar ultraviolet radiation (sunlight) and oxygen molecules, which make up 21% of the atmosphere.

- Solar ultraviolet radiation breaks apart one oxygen molecule (O2) to produce two oxygen atoms (2 O)

-Each of these highly reactive atoms combines with an oxygen molecule to produce an ozone molecule (O3).

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