this post was submitted on 05 Aug 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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Utilities are trying hydrogen-blended fuels. There are a lot of ‘unknowns.’ (floodlightnews.org)
submitted 4 months ago by jeffw@lemmy.world to c/climate
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[–] leisesprecher@feddit.org 13 points 4 months ago (1 children)

Adding 10% hydrogen was perfectly normal in Germany for decades, since hydrogen was a waste product of many industrial processes.

The question is: how the fuck is hydrogen supposed to be an economical solution? It's really really expensive and burning it in a stove isn't exactly efficient.

[–] vividspecter@lemm.ee 7 points 4 months ago (1 children)

Especially as renewable energy costs continue to decline in the future, it's hard to believe hydrogen will be competitive with electrification.

[–] aBundleOfFerrets@sh.itjust.works 2 points 4 months ago (1 children)

As energy costs decrease, so does the biggest expense in electrolysis

[–] vividspecter@lemm.ee 2 points 4 months ago

True, but I still can't see delivering it directly to homes as ever being viable (other than a delay tactic). As long term storage? Yeah, that may happen.