Ozone+23

Ozone Layer  Ozone, or trioxygen, is a triatomic molecule, consisting of three oxygen atoms.
 * Ozone layer deflects harmful ultra-violet rays from the sun.
 * Pollutants, for example smoke, create holes in the ozone layer. When they do, the ultra-violet rays penetrate the atmosphere leading to skin cancers.
 * The ozone layer is in the stratosphere. There are some ozone particles lower than that too, just not in that high amounts.