this post was submitted on 30 Apr 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.

Recommended actions to cut greenhouse gas emissions in the near future:

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Hydrogen Offers Germany a Chance to Take a Lead in Green Energy (www.nytimes.com)
submitted 6 months ago by silence7@slrpnk.net to c/climate@slrpnk.net
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[–] sexy_peach@beehaw.org 1 points 6 months ago (1 children)

I will believe it when I see it. I have no idea how hydrogen made steel will ever be able to compete with steel made with (gas or coke????).

[–] MrMakabar@slrpnk.net 5 points 6 months ago (1 children)

It is the most realistic way of making steel without fossil fuels. Also when you use fossil gas to make steel, you first crack it into hydrogen. That part of the process works very well and on scale. The only really important thing is to make hydrogen in a green way and that is difficult.

[–] sexy_peach@beehaw.org 1 points 6 months ago (2 children)

I get it but it takes soooo much power, I don't think it can reach price parity.

[–] federalreverse@feddit.de 5 points 6 months ago

At some point, we'll either need to price in the externalities or find a different tool than price.

[–] MrMakabar@slrpnk.net 3 points 6 months ago

With carbon pricing it becomes more attractive. Otherwise it has no chance.