The very best bio-char comes out of hemp, so we simply grow the bio-mass on site in greenhouses using the fastest growing form of bio-mass on earth. The outputs of this become biodiesel or electricity and bio-char to increase outputs in ALL our gardens. Part of what makes hemp superior also is the the bio-char produced from it can also be used to manufacture graphene, creating yet another locally sourced, organically grown building material. Beyond what can be done with the hemp fibers for manufacturing everything from cars, planes, and houses with it as the sourced building materials too.