Question

Write a note on ozone depletion.

Answer 1

1. The thinning of the ozone layer in the upper atmosphere is called ozone depletion.
2. The ozone (O₃) layer in the upper atmosphere, absorbs harmful UV radiations from the sun, thus protecting people on the earth.
3. Depletion of the ozone layer in the upper atmosphere is caused by nitrogen oxide released from the exhaust system of cars or supersonic jet aeroplanes.
4. Depletion (thinning) of the ozone layer can also be caused by chlorofluorocarbons (freons) used in aerosol and refrigerators and their subsequent escape into the atmosphere.