Charcoal
Charcoal is carbon produced by the pyrolysis of wood in the absence of oxygen. Made in kilns, where the wood was stacked under a layer of clay, until the 19th century, charcoal is now produced in modern furnaces.
Charcoal is carbon produced by the pyrolysis of wood in the absence of oxygen. Made in kilns, where the wood was stacked under a layer of clay, until the 19th century, charcoal is now produced in modern furnaces.
