It is crucial to guarantee that the production of charcoal used as biochar by the sponsored farmers does not contribute to the deforestation and/or increase the pollution of the local environment. Unfortunately, in most developing countries today, charcoal is still produced from non-renewable biomass sources and with traditional methods (e.g. earth mound kilns) that are inefficient and harmful to the environment.

Biochartrust promotes therefore as far as possible alternative methods for biochar production, that have been improved to be more efficient and to be used with renewable biomass (e.g. rice husks, cotton stems) as feedstock. When no such device is available but farmers are motivated to perform biochar trials, Biochrtrust determines with them the best solution according to their context and capacity and add the price for the construction of the decided technology in the price for the project. A small biochar cookstove for one household can be as cheap as a few US dollars, while a pyrolyzer for a large production can reach several thousands US dollars. A list of available biochar production technologies can be consulted online.