Biochar or Terra Preta, is a name for charcoal when it is used for particular purposes. Like all charcoal, biochar is created by pyrolysis of biomass. Biochar can increase soil fertility, raise agricultural productivity and reduce pressure on forests, though the degree to which results offer long term carbon sequestration in practice has been challenged. Biochar is a stable solid, rich in carbon and can endure in soil for thousands of years.
