this post was submitted on 04 Jun 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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Carbon capture company emits more than it captures (climateandcapitalism.com)
submitted 3 days ago by hanrahan@slrpnk.net to c/climate@slrpnk.net
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Between April 2021 and October 2024, British physicist Michael de Podesta paid £40 per month to carbon capture company Climeworks. In return, the company promised to remove 50 kilograms of carbon dioxide each month. But in September 2024, de Podesta wrote that “when I checked the other day they had removed precisely no CO₂ from the atmosphere”.

The following day, de Podesta wrote, “I conclude that I am indeed a gullible idiot.”

Climateworks’ business model involves selling carbon credits for CO₂ that it hopes to capture in the future

Good scam if you can convince people...so have they convinced anyone

Microsoft, UBS, Morgan Stanley, Stripe, Shopify, British Airways, Lego, Swiss Air, PwC, and TikTok.

Oh /s

I guess "in the future" is a promise you can always give, like "free beeer tomorrow"

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[–] Gsus4@mander.xyz 7 points 3 days ago* (last edited 3 days ago) (1 children)

"We told you so" (sponsored by 2nd law of thermodynamics)

I like those green algae bubblers set up on the exhausts of thermal powerplants, though, those are fun and work (partially), unlike this carbon capture fairytale bullshit.

[–] stormeuh@lemmy.world 3 points 3 days ago

It's also kind of obvious by accounting for concentrations why this kind of carbon capture is a fairytale, isn't it. Trying to capture from a carbon source like an exhaust, you'll see a gas that's easily 80% CO₂, compared to the meager 0,04% (400ppm) concentration in regular air. My guesstimate is that you'll easily produce more CO₂ than you're able to capture just trying to move enough CO₂ molecules through the capture device, even if you're 100% efficient in capture.

Also a sidenote: I think carbon capture at the source has its use in combatting climate change, but we must not forget reduce > reuse > recycle. Carbon capture is very much recycling, so we should be careful to only do it for situations where it's very hard to decarbonize.