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.
Via Dr. Stefan Gruenwald