Question

ozone formation and depletion

Answer 1

ozone is formed by O + O2 and deplete by CFC means use of chloro floro carbon.

Answer 2

Formation of ozone :

O2 --->u. v. rays --->[o] + [o]

O2 + [o] ---> O3 (ozone)

Depletion of ozone :

C. F. C released from ACs,etc. convert:

O3 ---> O2 + [o]

Hope it will help you!