this post was submitted on 04 Nov 2025
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Discussion of climate, how it is changing, activism around that, the politics, and the energy systems change we need in order to stabilize things.

As a starting point, the burning of fossil fuels, and to a lesser extent deforestation and release of methane are responsible for the warming in recent decades: Graph of temperature as observed with significant warming, and simulated without added greenhouse gases and other anthropogentic changes, which shows no significant warming

How much each change to the atmosphere has warmed the world: IPCC AR6 Figure 2 - Thee bar charts: first chart: how much each gas has warmed the world. About 1C of total warming. Second chart: about 1.5C of total warming from well-mixed greenhouse gases, offset by 0.4C of cooling from aerosols and negligible influence from changes to solar output, volcanoes, and internal variability. Third chart: about 1.25C of warming from CO2, 0.5C from methane, and a bunch more in small quantities from other gases. About 0.5C of cooling with large error bars from SO2.

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Stratospheric Aerosol Injection may not be enough to save coffee, chocolate and wine, new study finds (ioppublishing.org)
submitted 4 days ago by silence7@slrpnk.net to c/climate@slrpnk.net
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The paper is here

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[–] zd9@lemmy.world 18 points 4 days ago

SAI is not a viable solution in general. I've studied this specifically, and it should be like a break-glass solution, if it all. It should be a "5 billion people will absolutely die unless we don't do it" type of thing.

Once started, it will have to be continued due to threat of termination shock, which could essentially compress all of the climate effects in the next 5 decades into 1 year or so, which will cause many millions of deaths. Also it will negatively affect some areas, and positively affect some areas, but it's very hard to precisely determine those areas, which can lead to geopolitical tensions and even war.