Remember that piezoelectric road prototype we saw late last year? Looks like someone (besides us) thought it was a good idea. According to The Daily Mail, a Sainsbury's supermarket in Gloucester, UK (you've never been there), has installed kinetic plates in the parking lot that use the weight of shopper's cars to pump a series of hydraulic pipes, which in turn drive a generator. The system is said to generate up to 30kw of energy an hour -- or enough to power the store's checkouts. And if that weren't enough, the store is also harvesting rainwater and heating it (during the summer, at least) with solar panels. The next in this store's "eco-friendly evolution?" Might we suggest Soylent in the deli? We hear the "green" stuff is particularly good.

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