this post was submitted on 19 Apr 2024
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Climate - truthful information about climate, related activism and politics.

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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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'No place in our homes' | Hydrogen blends leak twice as much in household cookers compared to gas: report | leakage rate is likely to wipe out any climate benefits of using H2 in the first place (www.hydrogeninsight.com)
submitted 6 months ago by [email protected] to c/[email protected]
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[โ€“] [email protected] 38 points 6 months ago (1 children)

Pure hydrogen is heavy greenwashing - after many years talking about green generation, still over 90% is created from natural gas, by the usual fossil fuel companies; they are also the ones promising to build the green hydrogen factories, by the way. It is indeed barely suitable for (direct) consumer use and highly inefficient for electricity generation (like 10% efficiency iirc).

[โ€“] [email protected] 1 points 6 months ago

Long duration energy storage efficiency with hydrogen is closer to 40-45%. It is feasible and a good option in certain grid applications.