Dog poop that powers gas lights via a biodigester. Neat, but...
Could everyone please stop putting their dog waste in plastic bags and then just leaving the bags on the ground ?!?! Please ???? Either take them away, or just let it decay naturally instead of littering the place with non-degradable plastic. Then we can talk about using it to power lights.
http://www.bbc.co.uk/news/video_and_audio/must_see/42568333/inventor-shows-how-dog-poo-can-power-a-street-lamp
Ooh, animal waste powered robots that clean up animal waste.
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