this post was submitted on 25 Dec 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.

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The Problem with Turquoise Hydrogen made from Fossil Gas (industrydecarbonization.com)
submitted 2 days ago by hanno@lemmy.world to c/climate@slrpnk.net
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[–] youngalfred@lemm.ee 15 points 2 days ago (1 children)

[–] federalreverse@feddit.org 1 points 1 day ago

Gotta hold out for Holy Panda hydrogen, I guess.

[–] grue@lemmy.world 7 points 1 day ago (1 children)

Hydrogen is either "green," or it's greenwashing bullshit.

[–] absentbird@lemm.ee 3 points 1 day ago (2 children)

Yeah, if it's being made with surplus power from renewables it's great, basically a gaseous battery, but otherwise it's just fossil fuels with extra steps.

[–] nous@programming.dev 5 points 1 day ago

And every extra step adds more losses and reduces the efficiency. So it is worst then just using the fossil fuels directly.

[–] skuzz@discuss.tchncs.de 2 points 1 day ago (1 children)

Surplus power from anything. Existing base load power plants have periods of reduced use and do not adjust rapidly to change in load. Might as well harvest that as well. I think it is often utilized by heavy industry currently, for smelting plants and the like.

[–] absentbird@lemm.ee 1 points 1 day ago

If we continue investing in wind and solar, at a certain point it will be an almost daily issue to have more power than is needed. If some of the excess could be turned into hydrogen it could be huge for decarbonizing transportation.