It's a fit as natural as sour cream and onion: a potato-chip maker that employs recycled fry oil to power a fleet of company cars. Kettle Foods (you know, the Kettle Chips brand with those bulletproof Mylar bags) operates a number of biodiesel-powered Volkswagen New Beetles to buzz around its hometown of Salem, Oregon. According to the company, it uses distilled sunflower and safflower oil, a blend it calls "Flower Power," to save as much as 4.5 tons in CO2 emissions per vehicle every year.

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