A new report suggests that the 1987 ban on hydrochlorofluorocarbons has been successful in reversing the erosion of the ozone layer and that exposure to UV rays is declining.

The sustained damage to the ozone layer had been caused by aerosol spray cans and refrigerators emitting chlorofluorocarbons (CFCs). In 1987, the United Nations responded, banning the manufacture and use of CFCs and other substances under the Montreal Protocol. Since then, the hole in the ozone layer has been shrinking.

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