Well I would postulate, as a complete layperson, that the amount of lithium leaching out of rocks into the ocean is more per year than we could realistically extract. So in a way, it could be sustainable.

I mean, it’s about as sustainable as you can get on earth I would imagine, there’s a huge amount of lithium in seawater. It would take an insanely long time to deplete the 180000000000 tons of lithium in sea water.

Thomas Jefferson said it a wee bit earlier.

I’m assuming this quote attribution is a joke…

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