Diesel Gets Cleaner and Greener

For years, diesel engines have been the rage in Europe. They're powerful, use relatively cheap fuel, and can propel a car 40 miles on a single gallon. But they've never really caught on in the U.S., where memories of 1970s-era soot-belching diesel cars still linger. Now, DaimlerChrysler (DCX) is trying to clear away that old image. The company has engineered a new emissions technology that promises to make diesel as clean-burning as gasoline. Daimler also has just announced plans to unveil its clean-diesel exhaust system in the U.S. in the latest Mercedes E-class sedans.

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