The ozone layer that shields life from the sun's cancer-causing ultraviolet rays is showing its first sign of thickening after years of dangerous depletion, a UN study said on Wednesday. Experts said it showed the success of a 1987 ban on manmade gases that damage the fragile high-altitude screen, an achievement that would help prevent millions of cases of skin cancer and other conditions. The ozone hole that appears annually over Antarctica has also stopped growing bigger every year, though it will be about a decade before it starts shrinking, said the report, coproduced by the World Meteorological Organisation and the UN Environment Programme. via The Guardian.
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