[hedora]

I think the best bet is to figure out how to get desalination plants to also scrub CO2 and lithium from seawater. With government subsidies, it might actually turn a profit, and we'll need to do all three of those things anyway.

(Scrubbing CO2 from the atmosphere would also work, but would take longer to address ocean acidification.)

[myshpa]

We would need an immense number of such factories. Just lookup how much is already in the atmosphere, and how much are those technologies able to capture.

This is a feel-good technology, something to placate the population that something is being done.

We have better factories. They're called trees.