O3 is made only three ways. Lightning is a perfect example of making an abundance of O3 to purify the earth's surface Nature's way. You have noticed the clean fresh smell after a thunderstorm or dried clothing hung on a clothes line in the hot sun. Three, Cold Plasma. Cold plasma in the electronics industry explained further down.
High voltage breaks the two atoms of oxygen apart.
When this O3 molecule floats in the environment, one of the atoms spots a contaminant to attach itself to breaking away from the other two atoms. To it's surprise, the attack on the contaminant created an explosion. Both the contaminant and the atom are destroyed. This leaves the other two atoms behind. This explosion changed the contaminant into carbon dioxide and hydrogen which we can breathe.