sewage gas

British

noun

gas given off in the digestion of sewage consisting of approximately 66 per cent methane and 34 per cent carbon dioxide

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

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It can be planted anywhere, regardless of water, sewage, gas or electricity supply lines.

From Time Magazine Archive

Naval Research Laboratory have accomplished an even more amazing transformation: they have turned sewage gas into diamonds.

From Time Magazine Archive

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