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Explain the role of UV radiation in form...

Explain the role of UV radiation in formation of ozone with the help of a chemical reaction. Name the pollutant and write its role in depletion of ozone layer.

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The high energy of UV radiations breakdown some molecules of `O_(2)` into atoms of oxygen. One atom of oxygen binds to one molecule of O to form `O_(3)`. Ozone prevents UV rays to reach earth surface.
`O_(2)overset(U.V.)rarrO+O`
`O_(2)+Orarr O_(3)" (Ozone)"`
Example : Chlorofluorocarbons.
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