Generated: This meaning refers to the process of converting organic material into carbon or carbon-containing residues through heat in the absence of air.

Generated: This meaning refers to the process of heating substances in a sealed container to produce gas or vapors, which then can condense into liquid or solid forms without the presence of air.

Generated: This meaning encompasses the broader process and outcome of converting materials into carbon-rich substances, often through methods like pyrolysis or incomplete combustion.