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lithium is common but to get it's hard to extract, highest concentration is 0.14%(https://investingnews.com/daily/resource-investing/battery-m...) which means in 1 cubic feet of brine there are 0.0014 cubic feet of lithium. Imagine how much power it takes to dig it out (definitely monster construction machinery ran on fossil fuels etc) and then add extraction process to that. I would be interested to see if there are any sources digging deeper into it.

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Interestingly, lithium ion technology is also transforming "monster" mining equipment to run on pure electricity: https://www.youtube.com/watch?v=8UH4XgPN65Q (and this especially helps with underground mining)

But also, the brine is simply pumped. It's liquid.

It's not cheap to refine, but it's not going to "run out", so relevant to the upthread point the calculus on mine-vs-recycle isn't likely to change much.

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