These are the Athabasca tar sands, and there's an enormous amount -- first of mining, the largest trucks in the world are working here, and then you've got to pull out this black sludge, which is basically oil that doesn't flow. It's tied to the sand. And then you've got to use a lot of steam to separate it, which only works at today's oil Coal. Coal turns out to be virtually the same
星罗棋布，第一步是开采， 世界上最大的卡车在这里工作。 然后人们把这些黑色泥沙拉走， 这些黑泥基本上就是不流动的石油。 因为石油跟泥沙结合在一起了。下一步就要用 大量的蒸气使它们分离，其成本之高 只有在现在的高油价下才有可能。 煤炭事实上是差不多同样的