Reading the latest ozone assessment report [0] I was reminded again how impressive that reaction really was. Between deciding this really is a problem in 1985 (

Reading the latest ozone assessment report [0] I was reminded again how impressive that reaction really was. Between deciding this really is a problem in 1985 (Vienna Convention) and banning the problematic substances (Montreal Protocol) in 1987 there are two (2!!!) years. And if you look at the plots eg on page ES.23 you can see the expected effects of the Kigali amendment of 2016, where the replacement gases used instead of the previously stopped ones with large climate effects were also banned. This is the only actually positive thing I've ever seen in the context of climate change. There are at least 0.3°C saved temperature increase until 2100 due to this change. Of course the source of that problem was simpler and easier to fix, but still, this makes me a little happier. How can we repeat this success? [0] https://ozone.unep.org/sites/default/files/Assessment_Panel/SAP-2018-Assessment-report.pdf https://ozone.unep.org/sites/default/files/Assessment_Panel/...