Chemicals produced by humans, such as chlorofluorocarbons, or CFCs , deplete the stratospheric ozone layer. A hole in the stratospheric layer forms over Antarctica during fall in the northern hemisphere.
Ozone depletion occurs elsewhere around the globe as well .
The ozone layer prevents damaging ultraviolet rays from reaching the earth's surface. As the ozone layer becomes depleted, more ultraviolet radiation reaches the earth's surface. Too much exposure to ultraviolet radiation causes sunburn , and over time can result in skin cancer, cataracts, and suppression of the immune system . Genetic factors affect the succeptibility of an individual to skin cancer and other health effects. There are several common misconceptions about ozone depletion.