EVERYDAY SCIENCE

Detailed explanation-1: -Chlorofluorocarbons or CFCs are the main cause of ozone layer depletion. These are released by solvents, spray aerosols, refrigerators, air-conditioners, etc. The molecules of chlorofluorocarbons in the stratosphere are broken down by ultraviolet radiations and release chlorine atoms.

Detailed explanation-2: -Molina discovered that chlorofluorocarbons (CFCs) could deplete Earth’s atmospheric ozone layer, which blocks the sun’s damaging ultraviolet rays. When the scientists reported their findings in 1974, CFCs were widely used as refrigerant gases and as propellants in aerosol sprays.

Detailed explanation-3: -Gaseous CFCs can deplete the ozone layer when they slowly rise into the stratosphere, are broken down by strong ultraviolet radiation, release chlorine atoms, and then react with ozone molecules.

Detailed explanation-4: -Chlorofluorocarbons (CFCs) are mainly responsible for ozone depletion in the stratosphere. CFCs are used as coolants in refrigerators and air conditioners. When released in the troposphere, CFCs reach the stratosphere and produce ‘active chlorine’ in the presence of UV radiation.

Detailed explanation-5: -When chlorofluorocarbons (CFC) drift upwards towards the stratosphere, they come in contact with the Ozone layer. This leads to a chemical reaction where the CFC molecules are broken up by ultraviolet radiation, releasing chlorine atoms, which are able to destroy ozone molecules.