If, however, they are subjected instead to pyrolysis-a process of controlled burningin a low-oxygen atmosphere-the result is charcoal, a substance that is mostly elemental carbon.
但如果经过高温分解—在低氧环境下有控制的燃烧—它将会形成木炭，其大部分是永久碳。
2
The thermal technologies included high temperature over-burning, infrared destruction, plasma arc pyrolysis, molten salt destruction, supercritical water oxidation, in situ vitrification, and etc.