this post was submitted on 08 Dec 2023
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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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[–] [email protected] 24 points 11 months ago (2 children)

how carbon removal technology is like a time machine. They are both pipe dreams and distract from real helpful actions.

[–] [email protected] 3 points 11 months ago (3 children)

We will likely need both carbon reduction and sequestration to actually be effective in reducing carbon emissions in general. Here's an article that touches on that and as well as goes over concerns about relying too much on carbon dioxide removal.

[–] [email protected] 3 points 11 months ago (1 children)

I get that carbon collection on industry exhausts are necessary and a must have for a lot of products (like steel). But other than that this is silly. Plant trees and use them to build stuff, plant new trees after that. Rinse, repeat.

[–] [email protected] 2 points 11 months ago* (last edited 11 months ago)

I think we need to go a step further. The article I linked earlier touches on how several natural carbon sequestration systems rerelease carbon seasonally or have other implications. Seagrasses release carbon when water is warmer than usual. Trees release carbon during forest fires or from natural decomposition, and even potentially cause local atmospheric warming due to a low reflectivity. Artificial methods of sequestration are necessary, whether as systems that directly capture atmospheric carbon and store it or as systems that interrupt the process of natural decomposition or combustion and divert it to storage or further processing.

[–] [email protected] 2 points 11 months ago

Except:

  • Failed/underperforming projects considerably outnumbered successful experiences.

  • Successful CCUS exceptions mainly existed in the natural gas processing sector serving the fossil fuel industry, leading to further emissions.

  • Captured carbon has mostly been used for enhanced oil recovery (EOR): enhancing oil production is not a climate solution.

https://ieefa.org/resources/carbon-capture-crux-lessons-learned

[–] [email protected] 2 points 11 months ago (1 children)

Yeah the thing is that the sequestration takes more energy that we got before when we put it in. So I can see that we need it but its not effective until we essentially have carbon free energy serving all our needs and it would use the spare energy we don't need. Until then we have to cover more and more of what we are using today with carbon free or (much better) reduce what we use.

[–] [email protected] 1 points 11 months ago

That's a fair concern. I hope that becomes less of an issue as we incorporate more sustainable energy but unfortunately it seems that coal and gas lobbyists don't want to give up without a fight.

[–] riodoro1 2 points 11 months ago

Hey! Stop it with the attitude. You’re distracting the consumers from consuming.

[–] [email protected] 16 points 11 months ago (1 children)

If the world is emitting just under 40 billion metric tons of carbon dioxide in a year, how far back in time could this year’s total carbon removal take us? Right now, the answer is somewhere around 10 seconds.

That really puts it in perspective..

[–] Venat0r 2 points 11 months ago

I wonder how that compares with planting trees or other plants that absorb co2...