Spent beer yeast, invaluable grass clippings and already-processed vegetable oil from a local restaurant. They all appear to be useless compounds. But guess again. Never has the term "one man's waste is another man's treasure" been more applicable than with what's taking shape in the renewable energy camp, for the purpose of powering vehicles. Namely, planes, trains, buses and automobiles.

That beer you're enjoying: it's helping generate fuel to power vehicles in California. San Diego-based GreenHouse, a purveyor of green building services and products, is teaming-up with beer pioneer Karl Strauss Brewing Co. to convert spent beer yeast into ethanol fuel for California cars of all types. The endeavor comes on the heels of California Gov. Arnold Schwarzenegger unveiling in June of the revolutionary E-Fuel MicroFueler, a portable ethanol micro-refinery fuel system for consumer use. ...

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