Question

what do you mean by Ozone hole

Answer 1

ozone hole is a region of marked thinning of the ozone layer in high latitudes, chiefly in winter, attributed to the chemical action of CFCs and other atmospheric pollutants. The resulting increase in ultraviolet light at ground level gives rise to an increased risk of skin cancer.

Answer 2

depletion of ozone layer or thinning of ozone layer is known as ozone hole