Our known fossil fuel reserves are soaring. New finds of coal, natural gas, oil, tar sands, and oil shale keep growing, not declining.

已知的矿石燃料储备猛涨；不断有新的煤矿、天然气、石油、焦油砂和油页岩被发现；人口数量也在增长。

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Among those methods of ensuring the supply of liquid fuel, shale oil is a realistic energy substitute for petroleum.

在保证液体燃料供应的诸多办法中，页岩油是一种较现实的石油替代能源。

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A thin oil distilled from petroleum or shale oil, used as a fuel for heating and cooking, in lamps, and as a denaturant for alcohol.

煤油从石油或页岩油中提取的一种稀油，用于加热或做饭的燃料，也用于点油灯和做酒的。

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The federal government estimates that there's more than 1 trillion barrels of burnable fuel in the oil shale of the Rocky Mountains.

NPR: Industry Seeks to Extract Oil from Rocky Mountain Shale

We also have huge land and offshore oil reserves vital for transportation fuel, including enormous amounts contained along with gas in oil shale deposits amounting to several hundred years of supply.

FORBES: Renewable Energy Delusions: Getting A Real Grip On Alternatives

Oil shale and tar sands are other sources of liquid fuel that are harder on the environment than petroleum.

NPR: Will Pricey Fuel Prompt Greener Energy Habits?