The cave-making recipe calls for a steady emission of volcanic gas and heat, a heavy annual snowfall at an elevation high enough to keep it from melting during the summer.

洞穴的形成需要火山气体和热量的稳定释放，海拔高到足以防止每年的大量降雪在夏季融化。

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Nearby, super-hot volcanic gas can condense into as much as 4 tons of sulfur a day.

酸湖附近，温度很高的火山气体每天可凝结成4吨左右的硫磺石。

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Therefore, the paper carried out the completion optimization of Changling volcanic gas reservoir.

为此本文开展了针对长岭火山岩气藏的完井优化研究。

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Hear about how a new clothing line in Japan is helping to trim more than two million tons of greenhouse gas emissions and learn how engineers in Iceland are turning volcanic heat into usable power.

NPR: Memorable Moments 2007 Introduction

Understanding the changes caused by the volcanic eruption will help researchers predict how the oceans will respond to certain levels of the greenhouse gas carbon dioxide, Fraile-Nuez said.

MSN: Undersea eruption gives clues to effects of climate change