[hedora]

Here is some more context on related technologies:

https://www.american.edu/sis/centers/carbon-removal/fact-she...

The MIT article presents an expensive strawman alternative, but ignores simpler, cheaper technologies that already exist.

In particular, since CO2 acidifies the ocean, dumping alkaline chemicals into sea water converts the CO2 to inert solids, which precipitate out. At least, that's the theory. Caveats in link.

[pfdietz]

Or, adding limestone converts CO2 and CO3(-2) into 2 HCO3(-1).