Harmful ultraviolet radiations from the sun cause:

Maximum ozone layer depletion is caused by . . . . . .

Recognizing the deleterious effects of ozone depletion,an international treaty was signed at Montreal in $1987$ to control the emission of ozone-depleting substances,which is known as $.........$.

What is the result of the action of ultraviolet $(UV)$ rays on molecular oxygen $(O_2)$?

The zone of the atmosphere in which the ozone layer is present is called:

Which of the following atmospheric pollutants is directly involved in the depletion of the ozone layer?