All Aboard the Eco-Express: Rail's Hybrid Energy Solutions

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Trains have long been a more fuel-efficient way to haul freight than trucks, but now the federal government's amped up support in the alternative energy arena may help "the iron horse" go even greener with hybrid locomotives and other advances. [More] (http://www.scientificamerican.com/article.cfm?id=eco-express-hybrid-railroad)

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