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Photos: From gas guzzler to green extreme
Engineering professor turns an SUV and a family sedan into ultra-efficient driving machines.
1 of 2 Bill Detwiler/ZDNET
Hybrid Suburban
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.
2 of 2 Bill Detwiler/ZDNET
Hybrid Sable
A Mercury Sable retrofitted with one of Frank's hybrid systems. The car can also run on ethanol and solar-generated electricity, freeing it up from fossil fuels entirely. The stickers are optional.
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