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Ozone layer as protective layer. The ozone layer in the stratosphere is very useful to human beings because it absorbs the major part of harmful ultraviolet radiation coming from the sun. Therefore, it is called protective layer.
However, it has been observed that the ozone layer is getting depleted. One of the reasons for depletion of ozone layer is action of chloroflorocarbons(CFCs) and aerosol spray propellants. These compounds react with ozone gas in the atmosphere thereby depleting it. If the ozone layer in the atmosphere is significantly decreased, these harmful radiations would reach the earth and cause many damages such as skin cancer, genetic disorders in man and other living forms.