Before revision: In that context, charcoal can be made by numerous and varied methods, from the simplest ( an earth cover on the pile of wood, with strategically placed vents) to the most sophisticated (a modern equipment or plant that recuperates and processes strictly all exhaust gases into pyroligneous acid and syngas).
After revision: burning a pile of biomass by lighting it on the top (Top Down Burn / Conservation Burn) orIn that context, charcoal can be made by numerous and varied methods, from the simplest ( an earth cover on the pile of wood, with strategically placed vents) to the most sophisticated (a modern equipment or plant that recuperates and processes strictly all exhaust gases into pyroligneous acid and syngas).