Comment Then, why not bury back mined coal? And then... (Score 1) 100
And yes, that sounds a bit silly, but it highlights how silly this whole thing is.
Next logical idea would be to not dig out the coal from the mines, and instead sell the biochar to clients that would have bought the coal to burn it.
This reminds me people interested in pumping back the very dilluted CO2 from the atmosphere, with a complex and costly process, while there are concentrated CO2 sources (coal plants) that are ignored, and natural means to pump this CO2 (forests). Silly projects.