Question

Which‌ ‌agency‌ ‌is‌ ‌looking‌ ‌after‌ ‌the‌ ‌steps‌ ‌to‌ ‌reduce‌ ‌ozone‌ ‌depletion?‌

Answer 1

Hint: Ozone layer is the region of earth’s stratosphere that contains high concentrations of ozone and protects the earth from the harmful ultraviolet radiations of the sun.

Complete answer:
United Nations Environment Programme (UNEP) is the agency that looks after the steps to reduce ozone depletion.
Ozone layer depletion is the thinning of the earth’s ozone layer caused due to the release of chemical compounds into the atmosphere. These chemical compounds contain gaseous bromine or chlorine from industries or other human activities. The chlorine and bromine atoms in the atmosphere come in contact with ozone and destroy the ozone molecules. One chlorine can destroy \[100,000\] molecules of ozone. It is destroyed more quickly than it is created.
Some main causes of ozone layer depletion are:
Chlorofluorocarbons – CFCs are considered 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 the ultraviolet radiations and release chlorine atoms.
Nitrogenous Compounds – The nitrogenous compounds such as $NO_2, NO, N_2O$ are highly responsible for the depletion of the ozone layer.
Natural Causes – The ozone layer has been found to be depleted by certain natural processes such as Sun-spots and stratospheric winds. But it does not cause more than $1-2\%$ of the ozone layer depletion.
The volcanic eruptions are also responsible for the depletion of the ozone layer.

Note:
Some might say that rocket launches also result in depletion of the ozone layer. However, the validity of this argument has not been verified yet and is still under research. As of now, the ozone layer has started recovering and is said to be fully recovered by \[2050\].