Using waste heat from automobile exhaust

With the completion of a successful prototype, engineers have made a major step toward addressing one of the leading problems in energy use around the world today -- the waste of half or more of the energy produced by cars, factories and power plants. New technology is being developed to capture and use the low-to-medium grade waste heat that's now going out the exhaust pipe of millions of automobiles, diesel generators, or being wasted by factories and electrical utilities.

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