Advocates like the former oil tycoon T. Boone Pickens have also long sought to promote it as a substitute for coal in electricity generation or gasoline in a new generation of natural gas cars.

前油业大亨皮肯斯这样的支持者也一直以来试图将其作为电煤的替代者和在新型的天然气车中作为汽油的替代者。

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The closest substitute for coal in electricity generation is natural gas.

与煤炭最相近的发电替代品就是天然气。

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But wind farms--which substitute for coal as a fuel for electricity--have little to do with oil prices.

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Cheap US gas is already driving down the price of the biggest substitute for generating electricity, coal, freeing it up for export to Europe, where it is displacing Europe's relatively highly-priced gas.

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China is already investing billions of dollars to substitute hydropower (which counts as a renewable energy source) for coal and gas in electricity generation.

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