After a major setback in the 2010s, the most recent U.N. assessment says the Montreal Protocol has succeeded in safeguarding Earth's ozone layer.
The U.N. conducts its ozone assessments every four years, as part of the Montreal Protocol. The last assessment, published at the end of 2018, noted a disturbing resurgence of a particular ozone-harming emission, known as CFC-11—a banned chemical previously used in refrigerants and insulating foams.to manufacturing in eastern China. And, as the U.N.
And U.N. leaders also hope it serves as a roadmap for how we could navigate the regulation of other greenhouse gases. “Ozone action sets a precedent for climate action,” said Petteri Taalas, secretary general of the World Meteorological Organization. “Our success in phasing out ozone-eating chemicals shows us what can and must be done – as a matter of urgency – to transition away from fossil fuels, reduce greenhouse gases and so limit temperature increase.
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