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Fill up your kettle for free

PostPosted: Wed Oct 30, 2013 3:58 pm
by motman
Spotted this today
http://www.globalrailnews.com/2013/10/30/glasgow-subway-looks-to-turn-tunnel-water-into-heat-source/
On the face of it sounds a good idea. But will it get off the ground? (no pun intended)