Biochar could be a solid material obtained from the destructive distillation of biomass. Biochar is made through a method referred to as transmutation, means that thermal decomposition of organic material (i.e. wood chips etc, crop waste and manure) below restricted offer of O (O2), and at comparatively low temperatures (<700°C). Read more... https://weheartit.com/articles/335193619-environmental-benefits-of-biochar