The ozone hole is the depletion of the ozone layer. The ozone layer absorbs the harmful UV rays coming from the sun and therefore does not allow those rays to reach Earth's surface. Consequences of ozone depletion:Due to its depletion, more radiation enters the Earth's atmosphere. UV radiations cause ageing of the skin, cataracts, skin cancer, and sunburns. Hence, they are harmful. They cause the death of phytoplanktons which leads to a decrease in fish productivity. Excess exposure may even cause mutation in the genetic material of organisms.