this post was submitted on 14 Oct 2024
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What biomass grows the fastest without being waterlogged - I imagine bamboo or sugarcane or something
Grow that, and burn it to make carbon neutral steel; bonus points if you do it in a highrise/underground farm but frankly some medium term reversible environmental damage is preferable to killing off way more with climate change
Eh, purity is a thing. Biomass is the opposite of what you want there, but it could be doable. I do wager, however, that the largest "climate cost" of steel comes from the repeated melting of the steel.
Coal has a bunch of impurities compared to charcoal I thought?
And if the repeated melting is done by burning biomass/charcoal or with clean(er) energy then it's not a huge issue
Electric Arc Furnaces are probably our best bet for that - they're an established, proven technology and can be swapped over to a green power source without any other changes (assuming the society has the energy capacity). I think I remember reading that a factory somewhere in Europe had already done that but a quick search has failed me.
Certainly, they're the shit, but the energy capacity you mentioned is a huge issue. As I said in my other comment it should/could/has to be done, but it's anything but simple.