= Challenge X
{wiki=Challenge_X}
Challenge X was a competition organized by the U.S. Department of Energy in partnership with several universities and organizations, aimed at promoting the development of advanced vehicles that run on alternative fuels. It took place from 2004 to 2007 and involved a series of challenges for student teams to develop and demonstrate energy-efficient, environmentally friendly vehicles. The goal of Challenge X was to address the challenges of increasing energy demands and environmental concerns related to transportation.
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