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In 1955 Paul Crutzen, Mario Molina and Sherwood Rowland were awarded the #NobelPrize  in Chemistry for helping us understand why the ozone layer was disappearing. #OTD  in 1987, nations signed the Montreal Protocol to help us protect it. GIF: NASA/NASA Ozone Watch/Katy Mersmann

#OTD in 1987, Pres. Reagan signs the Montreal Protocol, joining int'l partners in first efforts to protect the ozone layer. The Protocol has been repeatedly strengthened by controlling add'l ozone-depleting substances and adjusting dates controlled substances are phased out.

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#Replug | Commonly known as the #WorldOzoneDay , September 16 commemorates the Montreal Protocol that was signed on this date by 24 UN member nations in 1987, to limit and ultimately phase out the production of manmade #chemicals 

In 1985, the world’s governments adopted the Vienna Convention for the Protection of the Ozone Layer. Under the Convention’s Montreal Protocol, governments, scientists and industry worked together to cut out 99 per cent of all ozone-depleting substances

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Good news for #ClimateAction  ⬇️ The Kigali Amendment to the Montreal Protocol has reached a major milestone, with Liberia becoming the 100th nation to ratify it. The Amendment targets a massive reduction in the use of climate-warming HFCs.

Join us tomorrow at 12:00 CEST/13:00 EAT to learn about how countries can harness sustainable cooling to support #COVID19  recovery while also meeting 🔵Paris Agreement goals 🔵Kigali Amendment to the Montreal Protocol goals 🔵The #GlobalGoals  #LCAW2020 

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The 1987 Montreal Protocol banning chemicals that destroy the Earth's protective ozone layer was an environmental success story. But now alternatives to those chemicals are showing up in Arctic ice, and it's unclear if they pose a threat to human health.

Bob’s Blog: The 1987 Montreal Protocol, which banned chemicals that harmed the ozone layer, is one of the great environmental success stories. Now, the alternatives to those chemicals may be posing a new threat to human health.

Persistent pollutants and the unintended side effects of the Montreal Protocol

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In #Kigali  for Meeting of the Parties to the Montreal Protocol. Need to phase down HFCs - potent greenhouse gases that drive #climatechange .

Emissions from eastern China account for at least 40–60% of the global rise in trichlorofluoromethane (CFC-11) emissions since 2013, according to a Nature study. This rise is contrary to the Montreal Protocol agreement to phase out CFC production and use.

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It’s the 30th anniversary of the Montreal Protocol to protect the ozone layer. and work together to study atmospheric ozone.

How the world avoided losing its protective layer of ozone - The effect of the Montreal Protocol in reducing the use of chlorofluorocarbons

Earth’s ozone layer would have collapsed by 2050 with catastrophic consequences without the Montreal Protocol

The Kigali Agreement to the Montreal Protocol reached this morning is a historic occasion, which will have a lasting impact on our planet.

Thirty years after the Montreal Protocol, the ozone hole is finally starting to heal:

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