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If you need some good news today, check page 34 on the new Ozone report: http://ozone.unep.org/sites/default/files/Assessment_Panel/SAP-2018-Assessment-report.
by kaybe 8y ago
If you need some good news today, check page 34 on the new Ozone report:
http://ozone.unep.org/sites/default/files/Assessment_Panel/SAP-2018-Assessment-report.pdf http://ozone.unep.org/sites/default/files/Assessment_Panel/S...
The finding that the ozone layer is behaving as predicted - probably healing - is not unexpected. It was depleting due to the gases now controlled under the Montreal protocol, the emission of which is decreasing very rapidly.
This plot however shows the contribution of these gases to global warming. As you can see there, it is going down over time! Of course the contribution pales in comparison to CO2, Methane and N2O, but it is still significant. And, if nobody messes up, it will go down.
It can be done! It's the easiest part, but it is a start.
edit: It also says that the main reason for 20th century climate changes in the southern hemisphere summer is actually the ozone hole over Antarctica. When it closes (projected to 2060) the changes will be undone. (p. 38) (pending too much influence from other greenhouse gases) I haven't seen the details, but maybe there's hope for Australia.