The Future of Fuel Oil has powered the growth of the United States, but there's increasing worry about America's heavy reliance on the fossil fuel. President Bush has gone so far as to call that dependence an "addiction." An NPR series examines some of the alternative sources of energy that industry is pursuing.

Squeezing Oil Out of Stones in the Rocky Mountains

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Canadian Dreams of Ethanol Distilled from Grass

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Turning Dirty Coal into Clean Energy

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