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How is ozone formed in the upper atmosph...

How is ozone formed in the upper atmosphere? Why is the damage of ozone layer a cause of concern to us ? State a cause of this damage.

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Ozone is formed in upper atmosphere by the reaction of ultraviolet radiations on oxygen molecule. The damages to ozone layer is a cause of concern to us as due to its damage, more ultraviolet rays reach the earth.s surface causing various health hazards.
`O_2 overset(hv)(to) O + O`
`O_2 + O to O_3` (Ozone)
A cause of this damage is the presence of large amount of chloroflurocarbons in the atmosphere.
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