[hannob]

The problem with decarbonizing is not being solved with green electricity and hydrogen. The (direct) emissions come from the carbon anodes that are consumed in the process. They are usually made from petroleum coke, aka they're fossil fuels.

Alternatives are being developed, but have a somewhat troubled history. Alcoa announced in the early 2000s that they are only months away from deploying inert anode technology. They're still not there (though still working on it in a project called elysis).