The American Council for an Energy-Efficient Economy, ACEEE has nominated the Toyota Prius C as “greenest” 2013 car. The Toyota Prius C bested other vehicles out of 58 candidates. It’s not bad for a vehicle that made its debut on the American market last year. The original Prius faired well also with a #3 position, but the new plug-in Prius hybrid only ranked #4. As far as the larger Prius V it came in at #11.