this post was submitted on 17 Jun 2026
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Climate

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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.

Recommended actions to cut greenhouse gas emissions in the near future:

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Hacking the atmosphere: Geoengineering gets a reality check | Researchers are starting to explore the tools and systems we need to develop to cool down the planet. (www.technologyreview.com)
submitted 5 days ago by silence7@slrpnk.net to c/climate@slrpnk.net
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[–] zd9@lemmy.world 1 points 4 days ago (1 children)

It's been done on very small scale tests like the SCOPEx test. It's done with marine cloud brightening (MCB) which is a different thing.

However, SAI is absolutely dangerous and if it's not continued indefinitely it will lead to termination shock. Because all of the CO2 emissions remain and will even increase, if you suddenly let that sun energy in again, all of the bad climate change effects will happen in months to several years, instead of many decades like it would normally. That would absolutely lead to war, billions dead, most agriculture dead, and near a complete collapse of the entire biosphere.

[–] silence7@slrpnk.net 1 points 4 days ago (1 children)

Yes. And because of how long CO2 concentration remains elevated, it needs to be continued for longer than civilizations last.

[–] zd9@lemmy.world 1 points 4 days ago

You just made previous comments advocating for it though, so I was pointing out the biggest danger of it, but now you're acknowledging this issue?