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.
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.
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。
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