DESTRUCTION OF OZONE
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