The ozone layer is a region of concentration of the ozone (O3) molecule in the Earth's atmosphere. The layer sits at an altitude of about 10 to 50 kilometers, with a maximum concentration in the stratosphere at an altitude of approximately 25 kilometers. In recent years, scientists have measured a seasonal thinning of the ozone layer primarily at the South Pole. This phenomenon is being called the ozone hole.
The ozone layer naturally shields Earth's life from the harmful effects of the sun's ultraviolet (UV) radiation. …
