Via Wikipedia: "Biochar is a name for charcoal when it is used for particular purposes, especially as a soil amendment. Like all charcoal, biochar is created by pyrolysis of biomass. Biochar is under investigation as an approach to carbon sequestration to produce negative carbon dioxide emissions. Biochar thus has the potential to help mitigate climate change, via carbon sequestration. Independently, biochar can increase soil fertility, increase agricultural productivity and provide protection against some foliar and soil-borne diseases. Furthermore, biochar reduces pressure on forests. Biochar is a stable solid, rich in carbon and can endure in soil for thousands of years." Would like to make it but don't want to do it wrong, no formal instructions or a public way of making it to benefit everyone. Like a modified version of the green waste program but taking the larger wood pieces and making biochar that could be sold or then given to the people to enhance there soil.