Excess use of C.F.C causes depletion of ozone layer.
a) What is C.F.C?
b) How does excess use of C.F.C cause depletion of ozone layer?
c) How is ozone layer depletion harmful to the living system an environment?

Explanation

a) Chloroflurocarbon
b) Chlorofluro carbons released in to the atmosphere reach the stratosphere and undergoes self decomposition to form chlorine. Chlorine thus formed decomposes the ozone molecule in to oxygen.
c) The ozone layer depletion disturbs ozone-oxygen cyclic equilibrium leading to decrease in the rate of absorption of ultra violet radiation.