EDUCATION (CBSE/UGC NET)

Detailed explanation-1: -Ozone depletion occurs when chlorofluorocarbons (CFCs) formerly found in aerosol spray cans and refrigerants are released into the atmosphere . CFCs cause chemical reactions that break down ozone molecules, reducing ozone’s ultraviolet radiation-absorbing capacity.

Detailed explanation-2: -Nevertheless, during the 1970s it was realised that man-made emissions of CFCs and other chemicals used in refrigeration, aerosols and cleansing agents may cause a significant destruction of ozone in the stratosphere, thereby letting through more of the harmful ultraviolet radiation.

Detailed explanation-3: -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-4: -Increased carbon monoxide may deplete tropospheric hydroxyl radicals, slowing down the removal of dozens of man-made and anthropogenic trace gases and thus indirectly affecting the earth’s climate and possibly the stratospheric ozone layer.