The ozone layer, which protects us from ultraviolet light and was found to have big holes in it in the 1980s owing to the use of CFCs is repairing itself and could be fully fixed in the next 15-40 years.

The ozone layer, which protects us from ultraviolet light and was found to have big holes in it in the 1980s owing to the use of CFCs is repairing itself and could be fully fixed in the next 15-40 years.
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