It's not something I've looked into much but I presumed it would be used as a form of direct air capture.
https://theconversation.com/why-we-cant-reverse-climate-change-with-negative-emissions-technologies-103504
https://e360.yale.edu/features/negative-emissions-is-it-feasible-to-remove-co2-from-the-air
We may be resorting to some of that, so any way of doing it cheaper is good.
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- They dont have a chance.