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London Underground Saves Energy

London Underground has been experimenting with a new system which recovers energy lost by braking trains, and it could save the subway system an impressive 5 percent on its energy bills. During one week of operation it recovered enough power to run a medium-sized subway station for two days. http://gizmodo.com/london-underground-is-trialling-regenerative-braking-to-1733329452 #tech

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