页岩比其他岩石将燃气困得更紧。
霍沃斯和他的同事综合这些因素认为页岩气的温室气体足迹比每单位能煤炭要高20%甚至高出一倍。
Howarth and his colleagues conclude that the greenhouse gas footprint of shale gas can be as much as 20 percent greater than, and perhaps twice as high as, coal per unit of energy.
提取页岩气比从地面抽取其他碳氢化合物更具破坏性——比起生产同等的常规天然气需要下沉更多的勘探井。
Extracting shale gas is more disruptive than hoicking other hydrocarbons out of the ground-far more Wells must be sunk than are needed to produce the same quantity of conventional gas.
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