this post was submitted on 10 Jul 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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Green steel can cut climate impact of car production for just €57 a vehicle | The auto industry can become a lead market for low-carbon steel production in Europe w/legal requirements (www.transportenvironment.org)
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[–] MindTraveller@lemmy.ca 3 points 4 months ago (1 children)

Is turning iron into steel technically carbon capture?

[–] astropenguin5@lemmy.world 2 points 4 months ago* (last edited 4 months ago)

Depends how you do it, currently absolutely not because it uses coal coke usually for the heating and/or carbon infusion. To have it be carbon capture you would have to heat it with an arc furnace or something, completely powered by renewables (this is actually very hard to to because of the ridiculously high temperatures involved) and then find some way to use captured carbon to put into the mix, or potentially using very pure charcoal or something

According to the article the way they define green steel is using arc furnaces or hydrogen to heat the steel, idk how they do the carbon input tho.