California Thieves Steal Used Cooking Oil to Brew BiodieselA few years ago, drums of used french fry grease were only of interest to a small network of underground biofuel brewers, who would use the slimy oil to power their souped-up antique Mercedes.<img src="http://feeds.foxnews.com/~r/foxnews/scitech/~4/294503141" height="1" width="1"/>
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