this post was submitted on 17 May 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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To be clear: we're going to use renewable hydrogen for some things, such as fertilizer manufacturing — there isn't any other way to do them sustainably. There are applications for which it's one of the most expensive choices, such as home heating, and a whole host of industrial processes and aviation sitting in between.

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[–] Mora@pawb.social 5 points 6 months ago (5 children)

It is not a 'gamble' right now. It is just 'plain stupid' right now.

[–] Ooops@kbin.social 10 points 6 months ago (4 children)

The opposite is true. There is no alternative to carbon neutrality and hydrogen will be needed in huge amounts to decarbonize certain sectors in industry and transport.

The problem are the insane amounts of story tellers that either pretend it will not work at all or that it's some magic solution so people can keep burning just another kind of gas without having to change anything. And both actually tell the same story: give up and stick with fossil fuels because it makes us rich.

[–] Mora@pawb.social 8 points 6 months ago (3 children)

There are 2 key messages in the article:

By the time hydrogen is made, stored and burned to make electricity again, there’s nearly 70% less energy than at the start — and the cost has tripled. Green hydrogen will probably only be useful towards the end of the energy transition, once primary electricity demand is being comfortably met by renewables, according to Pierre Wunsch, Belgium’s top central banker. “We’re not going to have green hydrogen in big quantities and cheap prices before that because of course we need to produce more electricity to electrify,” he said.

In most countries we are NOT at the point to able to spend excess electricity.

That’s perhaps why most green hydrogen projects only exist on paper or the websites of major gas companies like Equinor ASA, Shell Plc and Sinopec. [...] If they’re wrong, the world risks locking in decades of fossil fuel pollution and blowing past targets for cutting emissions.

Gas & oil companies do not care what you put into your cars, machines, etc. As long as you buy it from them. And if it does not work... oh well, they can continue selling Gas&oil as long as needed, damn the consequences😉


Bonus: All planned 'green hydrogen' facilities worldwide until 2035 will cover about 10% of Germany's demand: https://www.pik-potsdam.de/members/Ueckerdt/E-Fuels_Stand-und-Projektionen_PIK-Potsdam.pdf

[–] MrMakabar@slrpnk.net 1 points 6 months ago

Your bonus is for e-fuels, which is not hydrogen, but basically currently oil based fuels, like petrol, kerosin and so forth made from hydrogen and CO2 using electricity.

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