CFCs are synthetic harmful chemicals which are mainly responsible for ozone layer depletion. CFCs release chlorine atoms which break ozone to oxygen. More amounts of CFCs thus released will cause depletion of ozone layer. CFCs are used as coolants in air-conditioners, refrigerators, aerosols sprays, fire extinguishers etc.

Some effects of ozone depletion on living organisms are:

a. It causes skin cancer due to exposure to harmful UV radiations.

b. Causes genetic variations due to mutations.

c. Decreases photosynthetic rate in plants.

d. Decrease immune power in humans and cause eyesight problem.

e. It decreases crop yield.

f. It also disturbs rainfall causing ecological disturbance and reduces global food production.