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Associated Press
IMAGE DISTRIBUTED FOR SHELL - The IDEA CEU Car, vehicle No. 344, Prototype, running on Battery Electric, competing for team IDEA CEU Team from Universidad Ceu Cardenel Herrera, Spain, on the track during day 1 of practise at the Shell Eco-marathon Challenge Europe at The Ahoy centre in Rotterdam, The Netherlands on Wednesday, May 15, 2013. Teams from universities all over Europe have brought their energy efficient cars to compete through the three-day challenge. (Ermindo Armino/AP Images for Shell)

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