Q. 20

Briefly explain depletion of ozone layer and its effects.

Answer :

Ozone molecules form when a single O atm reacts with oxygen O2 molecule.

Chlorine containing compounds are major reason for the corrosion of ozone layer. Chlorofluorocarbons and certain other ozone depleting substances that contain chlorine and/or bromine are responsible for depletion of ozone layer. CFCs are made of chlorine. One single atom of chlorine destroys 1000 molecules of ozone.


Effects of ozone depletion are-


More skin cancer in humans due to ultraviolet radiations which will easily reach the skin cells through stratosphere if ozone layer depletes.


UV radiations would also damage parts of eyes thus causing cataracts, blindness and other diseases.


Immunosuppression- UV radiations could damage the immune system.


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