Is ozone only found in the troposphere?
No, ozone is found in all layers of the atmosphere. In the troposphere, ozone is considered a pollutant, because it contributes to smog and gives a bitter taste to the air, but in the stratosphere and ionosphere, ozone absorbs ultraviolet radiation and reduces our risk of sunburn and skin cancer. Ozone is naturally produced when radiation strikes oxygen and ionizes it, and the oxygen ions recombine into ozone.
