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I thought the argument was not that CFCs caused the hole, or it's seasonal fluctuation
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It was in most of the links.
There has not been the slightest abnormal increase of UV-B radiation on Earth, as most UV monitoring stations around the world prove it. The US has closed its network of UV monitoring stations when back in the late 80s and early 90s when Dr. Joseph Scotto, of the Biostatistic branch of the National Cancer Institute published his study in Science telling about a decrease of 7% UV-B radiation in the USA between 1974-1985. (Scotto J. et al., “Biologically Effective Ultraviolet Radiation: Surface Measurements in the United States, 1974-1985, Science, Feb. 12,1988).