Six years ago, Laurence Kemball-Cook had a brainwave. A graduate of Loughborough university, he was doing a placement year at the energy company Eon, where he was given the job of finding a way to power street lighting with solar energy and wind. It didn’t work, he says, in part because there’s a lot of shade in cities. This got him thinking about other potential sources of power in busy urban spaces. The answer, he realised, was underneath his feet.
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