The ozone hole is a reduction in concentrations of ozone that occurs in the stratosphere high above the Earth.

The ozone hole is a real phenomenon that occurs in the stratosphere, where the concentration of ozone is reduced. This depletion is caused by the release of human-made chemicals such as chlorofluorocarbons (CFCs) into the atmosphere. These chemicals break down the ozone layer, which protects us from harmful UV radiation from the sun.