China is breaking new ground liquefying coal to make oil substitutes , which may in the long run help change its energy mix .
中国已经能用液化煤来生产石油替代品，这在长期内能改变各种能源使用的比重。
In an attempt to address global warming , a handful of power plants are capturing carbon dioxide during the energy-generation process , liquefying the gas under high pressure and piping it to geologic storage sites miles away .
