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Hole in one

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Hole in one In the 1970s, scientists discovered a gap in the protective ozone layer around the Earth. Ozone, a form of oxygen, filters out more than 90 percent of the Sun's damaging ultraviolet rays.

So when a gap in the ozone layer was found over Antarctica, scientists were very concerned. Increased ultraviolet radiation can cause skin cancer.

The hole in the ozone layer has been blamed on our use of chemicals called chlorofluorocarbons (CFCs).They were widely used in refrigerators, freezers and aerosol cans.

Although the use of CFCs is now heavily restricted, it may take years before the ozone layer repairs itself.


Tags: earth, ozone



Category: Education  - ( Education Archive)

Date Added: 12 December '11


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