Comment Here's a way better idea: BioChar (Score 1) 83
https://en.wikipedia.org/wiki/...
Biochar is the lightweight black residue, made of carbon and ashes, remaining after the pyrolysis of biomass, and is a form of charcoal.[1] Biochar is defined by the International Biochar Initiative as "the solid material obtained from the thermochemical conversion of biomass in an oxygen-limited environment".[2] Biochar is a stable solid that is rich in pyrogenic carbon and can endure in soil for thousands of years.[3]
You don't "burn" wood, you burn whatever waste wood like product that would normally be trashed.