(a) Ozone layer is a rich zone of ozone found in upper atmosphere. It helps in shielding the earth from the harmful UV radiations. If ozone layer gets depleted, UV radiations can directly reach the earth's surface and drastically affect the life on earth. For instance, UV radiations coming from sun cause skin cancer. So, it is very important to protect the ozone layer so as to save our environment.
(b) Some of the ways to protect and stop the depletion of the ozone layer include not buying products in aerosol cans, maintaining air-conditioning filters and units. In order to halt the depletion of the ozone layer, countries around the world have banned the use of chlorofluorocarbons and other ozone depleting substances. These compounds produce chlorine and bromine atoms high in the atmosphere, and these atoms react with ozone and destroy it. By reducing the use of fluorescent lights, by minimising the use of vehicles to limit the emission of harmful gases that cause damage to the ozone layer, we can contribute to its protection.