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The "Hole" is a thinning area above each pole during their winter months. The primary cause of this thinning is known to be the fact that the sun can not reach the oxygen in order to create the inherently unstable ozone compound. As a result the ozone breaks down back into oxygen.

Solar activity also causes thinning. The largest known hole happened in 1858 from a unusually large solar flare.

Some people believe that CFC's which are heavier then air have managed to get into the stratosphere in quantities sufficient enough to cause some of the issue. Trace amounts of this gas have been found in the stratosphere.

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15y ago

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