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Road Paved with Pig Manure

A stretch of interstate highway near St. Louis, Missouri is now paved with asphalt made from pig manure:

"Whew!" gasped a worker with Pace Construction Co., the St. Louis County road contractor that joined forces with Innoventor, the Earth City-based engineering and design firm that perfected the process of converting the animal waste into a bio-oil used in asphalt binder.

To others, the air swelled with the sweet smell of potential for new manufacturing opportunities, jobs and, possibly, profits. How big is that potential? Nobody knows yet.

"If this works out, it's a win-win situation for everyone," said Karlton Krause, a hog producer from northern Iowa. "For farmers, it produces revenue. And at the same time, it helps clean the environment. We're taking a waste product and finding a value-added purpose for it." via Stuff | Photo: US Department of the Interior

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