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> apparently there is not enough lithium on earth to store renewable electricity

Any source for that? Also what quantity of power are we talking?

I am all for nuclear though.

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.

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