this post was submitted on 28 Feb 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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Carbon dioxide overload, detected in human blood, suggests a potentially toxic atmosphere within 50 years (link.springer.com)
submitted 3 days ago by silence7@slrpnk.net to c/climate@slrpnk.net
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[–] vestigeofgreen@lemmy.dbzer0.com 10 points 2 days ago* (last edited 2 days ago)

I took a quick skim. By toxic atmosphere, they mean as in probable health hazard, not as in directly killing people immediately.

Indoor co2 levels can easily hit 1000+ ppm co2, especially if your dwelling is well sealed, as many energy efficient dwellings are. Submarines keep co2 at the thousands ppm for extended periods and were the impetus for co2 studies on how much humans can take.

I don't think a major concern of rising atmospheric co2 is the direct threat to health caused by elevated co2 levels. I, personally, would be angered if someone told me that high co2 levels were dangerous to human health and then I read this.