By Roger Harrabin
The ozone layer that shields the earth from cancer-causing ultraviolet rays is showing early signs of thickening after years of depletion, a UN study says.
The ozone hole that appears annually over Antarctica has also stopped growing bigger every year.
The report says it will take a decade before the hole starts to shrink.
Scientists say the recovery is entirely due to political determination to phase out the man-made CFC gases destroying ozone.
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