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Vital Ozone GraphicsVital Ozone Graphics
Vital ozone Graphics is a compilation of illustrations and case studies intended to describe the issues dealing with the depletion and condition of the Ozone layer encasing earth. the ozone layer filters out dangerous ultraviolet (UV) radiation from the sun, thus protecting life on Earth. Scientists believe that the ozone layer was formed about 400 million years ago, essentially remaining undisturbed for most of that time. In 1974, two chemists from the University of California startled the world community with the discovery that emissions of man-made chlorofluorocarbons (CFCs), a widely used group of industrial chemicals, might be threatening the ozone layer.
Available online at: http://www.grida.no/publications/vg/ozone
The Antarctic hole The Antarctic hole
Despite progress achieved under the Montreal Protocol, the ozone “hole” over the Antarctic was larger than ever in September 2006. This was due to particularly cold temperatures in the stratosphere, but also to the chemical stability of ozone-depleting substances – it takes about 40 years for them to break down.
29 Nov 2007 - by Emmanuelle Bournay, UNEP/GRID-Arendal
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