What is ozone shield? How is it being corroded? - Vidyadip

Question

What is ozone shield? How is it being corroded?

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Answer

Ozone shield or ozone layer is a layer that protects earth from the harmful ultraviolet radiations coming from the sun thereby protecting us from serious ailments and thus acting as a shield. Ozone molecules form when a single $O_2$ atm reacts with oxygen $O_2$ molecule.
Chlorine containing compounds are major reason for the corrosion of ozone layer. Chlorofluorocarbons and certain other ozone depleting substances that contain chlorine and/or bromine are responsible for depletion of ozone layer. $\text{CFCs}$ are made of chlorine. One single atom of chlorine destroys $1000$ molecules of ozone.

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