[totallynothoney]

This obviously is not viable for X, Y, etc. reasons but I would like to know them. We select some fast growing woody plant that thrives on terrain useless for agriculture, we grow it at industrial scale and convert it to charcoal (using the energy generated for the process itself or the grid), we grind the charcoal and mix it with sea water and pump the slurry into some mine.

Creating charcoal and taking out of the cycle isn't actually net negative? We don't have enough space for growing or in mineshafts? I'm making Centralia 2.0? It's obviously non economic, but everything carbon capture is like that.

[sensanaty]

I am the furthest thing from an expert on this, but isn't the majority of natural CO2 capture done by Algae?