Just read this on bio-char.
Sound’s good to me. At £9/tonne this seems a sizeable contribution to GHG
reduction at a carbon price we already have in the EU cap and trade system.
I think the silver buckshot Al Gore cites will have many such low tech, low
cost solutions. For me making charcoal is an intuitively correct solution
as it seems to be a simple way of compressing the natural carbon capture
cycle that can be done at low capital costs and with lots of other benefits