Explain depletion of ozone layer and its effects.
Ozone depletion allows UV radiations to reach the surface of the Earth. This exposes or makes the Earth and its organisms more prone to the negative effects of UV radiation. For example skin cancer, deformities, plant discoloration etc. It also contributes in warming of the Earth's surface.
Ozone depletion occurs when the natural balance between the production and destruction of ozone in the stratosphere is tipped in favour of destruction.
Chlorofluorocarbons, carbon tetrachloride, and methyl chloroform are important human-produced ozone-depleting gases that have been used in many applications.
Stratospheric ozone depletion leads to an increase inUV-B that reach the earth's surface, where it can disrupt biological processes and damage a number of materials.