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The new system will be mostly powered by solar energy and a nearby wind farm. The city hopes to have it all in place by 2017 (Photo from Getty Images)   If you've ever taken the subway you know that the subway is not all that sunny. So it sounds unreal to hear of a subway system run mostly on solar power. That's what the city of Santiago, Chile is hoping to do on its 108-stop, 64-mile Metro system. Chile is one of the sunniest places on earth, but the metro will still need some help runni ...