What is ozone?
When oxygen gas (02) is exposed to UV radiation or electricity, such as from lightning, the jolt of energy causes it to form ozone (03)-the gas that gives the air its characteristic fresh smell after a lightning storm. Carrying an extra oxygen atom, ozone gas is much more reactive than the regular oxygen we breathe in air. It breaks down rapidly, which is why you can't buy it bottled or have it shipped to you.