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by TinyRick 1030 days ago
I'm not the OP, but Simon Michaux (working with the Geological Survey of Finland) is one person I follow who is doing good research in this field. I would recommend his paper "Assessment of the Extra Capacity Required of Alternative Energy Electrical Power Systems to Completely Replace Fossil Fuels" as an introduction to some of the estimates of rare earth materials available/required for a zero-carbon transition.