What is the O-zone layer and why is it important?
A layer of ozone in the atmosphere that absorbs ultraviolet radiation.
At the top of the troposphere (tropopause) is a form of oxygen that is unstable in the lower atmosphere, ozone or O3.
Unlike the other gases of the atmosphere O3 absorbs ultraviolet radiation. This fact protects life on Earth from getting bombarded with ultraviolet radiation which is carcinogenic.