Question

what is ozone layer?how a hole is created in ozone layer.

Answer 1

Ozone layer is a protective layer made of Ozonr(O3) which is present in the stratosphere(a layer of the atmosphere).It surrounds the Earth and protects us from UV rays and meteors.

A ozone hole is created in the ozone layer due to various human activities....
i)Pollution from factories.
ii)Harmful gases coming out from cars.
iii)Excess use of petroleum.

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Answer 2

ozone layer is a protective layer that is present in stratosphere.

a ozone hole is created from the pollutants of factories, chemical fertilisers, smokes and others.