The depletion of the ozone layer refers to a reduction in the concentration of the ozone layer. It is caused by ozone-depleting substances (ODSs) such as chlorofluorocarbons (CFCs), methyl bromide, nitrogen oxides, and chlorine.

Effects of the depletion of the ozone layer:

(i) It causes skin cancer due to excess exposure to UV radiation.

(ii) It damages the eyes and the immune system.

(iii) It affects plants, thereby decreasing crop yields.