Natural gas is one of the clean fuel.

天然气是一种清洁燃料。

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Studying the use of the clean fuel (natural gas) with the environment is the nowadays leading technology in the world.

将清洁燃料（ 天然气）的利用与环境结合起来进行研究，是当今世界的前沿科学技术。

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The current low fossil fuel price environment will thus certainly delay the energy transition from fossil fuel to clean energy sources.

因此，当前化石燃料价格较低的环境必然会推迟从化石燃料向清洁能源转型的过程。

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How's this for irony: The clean fuel of the future could end up being developed by the oil titans of today.

FORBES: Magazine Article

The administration reiterated its support of the clean burning fuel yesterday, just one week after U.S. Reps.

FORBES: Regulatory Grinches Threaten Obama's Natural Gas Christmas Wish

Profit potential is highest in California, which has the tightest refinery capacity and the most stringent clean-fuel regulations in the country.

FORBES: On The Cover/Top Stories