Green gas is released through a rather large valve into two helicoil tubes.

绿色气体通过一个相当大的阀门释放到两个螺旋油管中。

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How come green gas smells different than fuel propane?

为什么绿气闻起来和燃料丙烷不同？

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Different bottlers of fuel propane use different odourants and so do green gas bottlers hence the different smells.

不同的燃料丙烷使用的 刺激性 气体的添加剂都不同，所以绿 气的味道也许是不同的。

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Scientists warn that without an agreement to reduce so-called green house gas emissions, global temperatures will continue to rise, with the catastrophic consequences of extreme weather events, the spread of drought and disease, and the extinction of plant and animal species.

VOA: standard.2009.12.09

Mulva likes gas less for its green qualities, more because gas reserves are easier to secure and help the company replace its declining oil production.

FORBES: ConocoPhillips' Mulva Talks Up Gas

Shedding the green and white gas stations that stretch from New Hampshire to Florida, the vast majority of which are owned by Hess rather than franchisees, will allow the company to broaden exploration and production capabilities.

WSJ: Hess, under pressure, to exit retail business

As domestic solar crashed, the green swan of shale gas took wing.

FORBES: The Lessons Of Solyndra: Green Swans, Opportunity Cost And Fast Neutrinos