translation.en: But the truth is that, on average, turning that gunk into crude oil produces about three times more greenhouse gas pollution than it does to produce conventional oil in Canada.
translation.zh: 但事实是，平均来说 把这黏糊糊的东西变成原油 会产生比加拿大常规的产油方式 三倍以上的温室气体 排放。