Question

Which compounds are responsible for depletion of the ozone layer?

Answer 1

Hint: The ozone layer was first found in 1913 by the French physicists Charles Fabry and Henri Buisson. Ozone layer is a thin layer of earth atmosphere which absorbs the sun’s harmful UV lights. It is composed of high concentration of ozone ($O_3$) and a small amount of other gases in the stratosphere. Ozone layer is present at the lower part of the stratosphere.

Complete Answer:
- The Ozone layer has the ozone gas which is made by three oxygen molecules.
- Ozone gas is blue in colour.
- Chemically ozone formation takes place when UV light hits on the stratosphere part of the atmosphere then oxygen molecules dissociate into atomic oxygen which further combine with oxygen and form the ozone molecules.
- Ozone layer depletion is defined as the process in which destruction of ozone gas molecules by reduction leads to holes in the ozone layer.

So, the correct answer is manmade causes and natural causes.
Compounds are Chlorofluorocarbons, halogens, methyl chloroform and hydrofluorocarbons.

Additional information:
- There are various harmful effects of UV radiation to human health because of ozone depletion UV radiation reaches to earth.
- Skin cancer, cataracts, suppression of immune system, premature aging of skin, sunburns and blindness.
- Various diseases occur in plants.

Note: There are three different types of UV radiations: UV A, UV B, and UV C.
- UV A radiations are not absorbed by an ozone layer it reaches to earth not harmful.
- UV B radiations are mostly absorbed by the ozone layer and have some harmful effect.
- UV C radiations are completely absorbed by the ozone layer.