Explain ozone depletion. How can ozone depletion be prevented?

Explanation

Ozone present in stratosphere plays a vital role in protecting the life on earth.s surface from harmful UV radiations. Ozone layer acts as a shield as it absorbs highly energetic harmful UV radiations. Pollutants such as CFCs when reach stratosphere react with ozone, and thus, depletes the ozone layer in a period of time. Hence, UV radiations reach tropospheric layer and cause many undesirable effects like skin cancer, cataract, damage to plants and crops, etc. Discovery of alternative substances for CFCs used in refrigeration systems and aerosols can prevent depletion of ozone.