[hacker934]

Burying old trees underground seems like the simplest solution to this issue. An old tree represents hundreds of years of removing carbon dioxide out of the air and converting it into a form that is convenient for storage. We only need to do the last step of making sure that invested carbon sequestration is not put back into the atmosphere through decomposition or fire.

Here's a link to a relevant publication (from a university that unfortunately doesn't have the prestige or marketing team of MIT): doi.org/10.1186/1750-0680-3-1

[DennisP]

It sounds simpler but would involve a lot more logistics. You'd be moving lots of heavy stuff around, building new roads for it, monitoring to make sure the logging companies really are gently removing sustainable bits here and there instead of just clearcutting valuable ecosystems, etc.

Where with MIT's method, you put a machine next to a good spot for geological storage and turn it on. According to articles I've seen on similar methods (Climeworks etc), it would be about a thousand times more efficient in terms of land area.