It takes up to four barrels of water to generate one barrel of tar-sands crude, and 20% of Canada's natural gas (a clean fuel) is used to produce oil (a dirty one).

每采集一桶焦油沙原油需要耗费四桶水。加拿大20%的天然气（清洁燃料）用来提炼石油（脏的原油） 。

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It takes up to four barrels of water to generate one barrel of tar-sands crude, and 20% of Canada's natural gas (a clean fuel) is used to produce oil (a dirty one).

每采集一桶焦油沙原油需要耗费四桶水。加拿大20%的天然气（清洁燃料）用来提炼石油（脏的原油） 。

youdao