this post was submitted on 17 Dec 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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If we want to use Direct Air Captur to limit overall warming to 1.5°C, while emitting enough to reach 2.5°C, DAC would need to use something like 30% of all electricity consumed over the next 80 years (slrpnk.net)
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[–] HubertManne@piefed.social 3 points 6 days ago

lol. we would need a direct air capture that does not produce more carbon than it captures in its total lifecycle. So maybe doable is our totaly energy infrastructure is otherwise clean. Solar, geo, wind, hydro, nuclear, etc still produce co2 in their lfecycle. Im not sure if we will ever get resource extraction or recycling to be 100$ non co2 producing. I have not seen a direct air capture system that does not even produce less carbon than captures if its energy is not carbonless and that does not even take into account the prodcution of it and as people point out the fact it would need to be built and run with no economic incentive except for what governments produce by direct payments or carbon taxes.