Destruction of ozone happens naturally in the Chapman Cycle (of which the first three reactions are explained in the previous pages):

O2 + hv = O + O

O + O2 + M = O3 + M

(M is a third inert molecule required to take away the heat generated in this reaction)

O3 + hv = O + O2

O3 + O = 2O2

Ozone is destroyed in the fourth reaction but not very effectively. The reaction can be speeded up when catalysed by molecules present in the stratosphere.


Catalytic Destruction of Ozone

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