Photos: Barnyard energy

Moooo! This thermophilic digester at the Five Star Dairy in Wisconsin transforms cow manure and other waste products in 21 days into biogas. The farm doesn't smell nearly as bad after one of these goes in, according to Lee Jensen of the Five Star.

American Images, Marshfield, Wisc.

About Bill Detwiler

Bill Detwiler is Managing Editor of TechRepublic and Tech Pro Research and the host of Cracking Open, CNET and TechRepublic's popular online show. Prior to joining TechRepublic in 2000, Bill was an IT manager, database administrator, and desktop supp...

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