An "ozone hole" is:
A) a region centered on the equator where ozone levels are always very low because of destruction by direct sunlight.
B) a region of the stratosphere, often above the South Pole, where ozone levels occasionally drop to very low levels.
C) the name given to small pits or holes on the aluminum surface of an aircraft, etched by the corrosive ozone encountered in the stratosphere and requiring regular maintenance.
D) a permanent region of very low ozone content in the stratosphere centered over the south pole that has been there for thousands of years; the resulting transparency to UV radiation accounts for the lack of life-forms there.

Question

Quizplus · Accepted Answer

A "ozone hole" refers to a region of the stratosphere where ozone levels are significantly lower than normal. This phenomenon is often observed above the South Pole during the Antarctic spring (September-November) and is caused by man-made chemicals such as chlorofluorocarbons (CFCs) that react with ozone and deplete it. The term "ozone hole" is a bit misleading as it doesn't refer to an actual hole in the ozone layer, but rather a severe depletion of ozone in a particular region.

An "Ozone Hole" Is