OZONE is a 3-atom oxygen form of
oxygen found
in both the troposphere and the stratosphere. Ozone
in the stratosphere occurs naturally and shields the earth’s surface from harmful ultraviolet
radiation. Ozone in the troposphere is a pollutant
associated with automobile exhaust.
Ozone can be destroyed in the stratosphere by CFCs, a chemical used in air
conditioners, and aerosol spray cans.