this post was submitted on 28 Oct 2024
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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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Arguing that H2 electrolysis is easier than a US battery industry (lemmy.ca)
submitted 2 weeks ago by humanspiral@lemmy.ca to c/climate@slrpnk.net
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China may dominate H2 as well, but mining and refining mining materials is difficult/expensive. H2 does require membrane manufacturing (which US pioneered), but platinum group metals make the best catalysts. Innovation in other materials/approaches are progressed, but then these innovations delay electrolysis deployments as they don't yet have the same capacity levels.

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[–] deegeese@sopuli.xyz 4 points 2 weeks ago (1 children)

Isn’t H2 a dead end storage technology?

I thought the only people still doing it were Japanese automakers on account of the sunk costs fallacy.

[–] humanspiral@lemmy.ca 1 points 2 weeks ago

Fuel cell (Hydrogen consumption) technology is ahead of low cost mass electrolysis deployments (hydrogen production). Batteries are doing very well in China, and still finding a way to be cheaper in the west too. Batteries help produce more electrolysis from renewables.

Article is saying that batteries are important too. It is a bit misleading in saying that cobalt is needed though. Cobalt and Nickel are needed for highest performance old tech batteries. For race cars. The price revolution in batteries is most pronounced for long lasting LiFePo chemistry batteries which avoids both metals, and used in value EVs, and grid storage. Batteries are not enough alone to exterminate oil/NG use.

[–] 4shtonButcher@discuss.tchncs.de 4 points 2 weeks ago

Several layers of losses and very complicated infrastructure needs compared to electricity. Also, H2 will be needed for industrial uses that need burning flame levels of temperatures and it’s enough trouble to meet that demand.