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Since the 1985 discovery of a hole in the ozone layer countries have agreed and amended treaties to aid its recovery. The most notable of these is the Montreal protocol on substances that deplete the ozone layer, which is widely regarded as the most successful environmental agreement ever devised.

A new study has revealed significant progress in the drive to reduce levels in the atmosphere of chemicals that destroy Earth's ozone layer, confirming the success of historic regulations limiting their production.

The findings, led by the University of Bristol and published today in Nature Climate Change, show for the first time a notable decline in the atmospheric levels of potent ozone-depleting substances (ODS), called hydrochlorofluorocarbons (HCFCs). These HCFCs are also potent greenhouse gases, so a reduction should also lessen global warming.

Source: Science Daily

https://www.sciencedaily.com/releases/2024/06/240611130306.htm

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