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06/26/2010 05:12 am ET | Updated May 25, 2011

Amtrak Trials First Cow-Powered Train

US rail operator Amtrak may have given the term "cattle car" a whole new meaning with the first test of a biodiesel train that runs on beef byproducts.

Operating on a $274,000 (£178,000) grant from the Federal Railroad Administration, the state-owned rail company has begun operating its daily Heartland Flyer train, travelling between Oklahoma City and Forth Worth, using B20 biodiesel fuel.

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