The discovery of gas hydrates provided a wide sphere and a new way of thinking for searching clean and effective energy source to replace increasingly exhausted tradition energy source .

天然气水合物的发现为寻找清洁高效的新型能源，以取代日益枯竭的传统能源提供了一个广阔的领域和新的思维方式。

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Natural gas is a clean energy source with increasing demand in the worldwide.

天然气作为一种清洁环保的能源，需求量越来越大。

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As the energy consumption structure changes, natural gas, a clean energy source, will be adopted mainly through boilers.

随着能源消费结构的改变，天然气这种清洁能源将主要通过锅炉被广泛应用。

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President Barack Obama has strongly endorsed natural gas as a clean energy source, and New York Mayor Michael Bloomberg has said more natural gas is critical for the city to improve air quality and public health.

WSJ: NY town of 9/11 workers wages gas pipeline fight

Shale gas production has become all the rage in the U.S. because it potentially increases the U.S. supply of natural gas, a clean burning energy source.

FORBES: China Closer To Joining Shale Gas Fracking Craze

Hydrogen produced from renewable resources is a promising source of clean energy, but the gas is difficult to handle and transport.

BBC: Hydrogen's energy promise improves