Correct selection of source gases and their compositions is one of the critical factors for si trench etching.

源气体及组分的选择是硅槽刻蚀技术的关键因素。

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Our use of fossil fuels is the main source of excess greenhouse gases.

我们对化石燃料的使用是温室气体过量的主要来源。

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It is home to the world's biggest coal company and an industrial-scale experiment to turn coal into diesel that could create a major new source of greenhouse gases.

这里拥有世界上最大的煤矿公司，并在进行一项能将煤变成柴油的工业规模试验，柴油可能成为又一种温室气体的主要来源。

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It focuses on the biggest human source of greenhouse gases - emissions of carbon dioxide, or CO2, from power plants.

NPR: Climate Change Grabs Congressional Attention

The rules for the oil sands, now the fastest growing source of greenhouse gases, have yet to be finalised and will not come into force until 2010.

ECONOMIST: Canada

Higher prices are needed to induce consumers and businesses to use less energy (the source of most greenhouse gases) and switch to fuels (from coal to natural gas) that have lower emissions.

CENTERFORSECURITYPOLICY: Center for Security Policy | Honesty is the Best Policy: Bush Must Do With The A.B.M. Treaty as He Has Done to the Kyoto Protocol