劍橋詞典natural gas that is found in shale (= a type of soft , grey rock ) 頁巖氣 They argued that the extraction of shale gas by fracking would cause huge environmental damage . 他們論証到，採用水力壓裂法抽取頁巖氣將對環(huán)境造成巨大破壞。 返回 shale gas