Photos: From gas guzzler to green extreme

What makes this Chevy Suburban different from most? It runs on a hybrid engine that gets its electricity from plugging into a wall outlet. Professor Andrew Frank built it at the University of California at Davis and has tested it on GM's off-road tracks.

Plug-in hybrids use less gas and consequently can get about 100 miles per gallon. However, it will take years before they become widespread.

Andrew Frank/University of California, Davis

By Bill Detwiler

Bill Detwiler is Editor in Chief of TechRepublic 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 support specialist in the ...