Ozone is produced by Diatomic oxygen undergoing rearrangement in the presence of electrical discharge.
Ozone is more potent oxidizing agent than the diatomic form.
Nature replenishes a lot of the Ozone layer that certain chlorofluorocarbons such as Freon, CCl 2 F 2 destroy. Sunlight can cause a photodecomposition of the Freon to produce Chlorine radicals which then react with the Ozone to decompose it. Nature during a lightening storm creates significant amounts of Ozone from the atmosphere. Besides arerosols like Freon, Nitrous Oxides that come from auto pollution can also lead to Ozone destruction. The Nitrous Oxide is actually serving as a catalyst in the net reaction of ozone with monoatomic oxygen.