this post was submitted on 26 Nov 2024
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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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Reality check on technologies to remove carbon dioxide from the air (news.mit.edu)
submitted 3 weeks ago by silence7@slrpnk.net to c/climate@slrpnk.net
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[–] i_am_a_cardboard_box@lemmy.world 6 points 3 weeks ago (2 children)

Kind reminder that the first solar panels had an efficiency of around 10%, and are now at 22%. The cost of photovoltaics has decreased 60% over the past decade alone.

Of course there is no 'silver bullet'. But the researchers of the original article still recommend working on projects like these.

[–] futatorius@lemm.ee 1 points 3 weeks ago* (last edited 3 weeks ago)

Except in this case, the atmosphere is a known (huge) size, the number of points at which capture technology can be applied is not that great, and the more CO2 that's captured, the harder it will be to capture more. And the way gases circulate through the atmosphere, it'll be even harder to ensure that it flows past the places where the scrubbers are located.

Unlike battery tech, none of those factors has a technical solution.

The whole carbon-capture business model is a con. Stop pollution at source, it's the only way that actually works right now. Quit pissing away money, effort and precious time on displacement activities like this and hydrogen.

Nationalize the fossil-fuel companies and start an orderly shutdown. It's the only way we will survive.

[–] RvTV95XBeo@sh.itjust.works 1 points 3 weeks ago

Projects like this are completely necessary, for after we phase out fossil fuels. Not "while we ramp down" or "so we don't have to shut off this plant over here". Once the phaseout is complete these systems help reign in the overshoot.