Oh yeah, related to Direct Air Capture and biochar, today when I should have been doing something else I ran into this new small start up from up where I went to get my Master's in soil microbiology.
This looks like a quite nice small-scale pyrolysis system. Of course the price is steep for a new product like this, but I hope that they'll be able to convince a bunch of cannabis growers making good profits to become early adopters.