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Comment by baq

4 days ago

Basically we need to grow trees as fast as possible, cut them down and bury them deep, exactly the opposite of what we’re doing when mining fossil fuels. No wonder there’s exactly zero people doing that.

There's been a proposal to bury them not-so-deep, but saturated with salt to prevent decomposition. It's not necessary to sequester the carbon forever, just on a time scale for natural absorption of the CO2 into oceans and then into carbonates (which is something like 100,000 years, IIRC).

Biochar is exactly doing that and is an active area of research in many places. There is several ongoing projects also showing that biochar can improve soil quality and crop yields.