Poo power on the farm

(CNN): Four generations of Saylors have worked the family’s dairy farm for nearly a century, but for the past three years, the cows have been doing something besides providing milk: They’ve been helping power the place. Growing up on the sprawling spread 90 minutes from Pittsburgh, 36-year-old farmer Shawn Saylor developed into a self-described science buff. So it was no surprise that, when faced with rising energy costs, Saylor turned to technology. He tapped into an abundant and easily accessible energy source: manure from about 600 cows.

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