•Ozone layer is a high concentration of ozone molecules present in the stratosphere.

•The main function of the ozone layer is to absorb the Sun’s ultraviolet radiation, hence protecting the Earth from its harmful effects.

•Depletion of the ozone layer is a cause due to excessive use of CFCs or ammonia.

•Damage of ozone layer is cause of concern because ultra violet radiation from the sun will reach the earth and will effect human beings, plants and animals.

•After the Montreal Protocol, the Ozone layer is improving by the control use of CFCs and other harmful chemicals.