Using the range of green gases we can offer a cost effective way of meeting our 2050 carbon reduction targets, whilst keeping our hot water running and the heating on. (politics.co.uk)
In its elemental form under standard conditions, it is a pale green gas about 2.5 times as dense as air. (sciencedaily.com)
Of course, signing up for green gas doesn't mean that folks will actually be cooking on poop gas — at least no more than they were already. (treehugger.com)