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Exotic cars for eco-millionaires

Companies that make some of the most expensive cars in the world are working to clean up their acts with more fuel efficient dream machines.

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Carmakers like Ford, General Motors and Toyota aren't the only ones who need to worry about stricter emissions regulations and public perception. Even very high-end automakers like Ferrari, Lamborghini and Bentley are working to "green" their image.

"If a company doesn't have a hybrid or an electric car, that stands out now," said Sebastian Blanco, the editor of Autobloggreen.com

Ferrari has been researching gasoline-electric hybrid power for its ultra-pricey and ultra-powerful sports cars. Last year, Ferrari showed off this concept car, the 599 HY-KERS, at the Geneva Motor Show.

All this research isn't just about meeting emissions regulations, insists Thomas DuPont, publisher of the DuPont Registry, a catalog for the super-rich. There is a genuine market for green ultra-luxury cars.

"If you've got one Ferrari and you can afford another, why wouldn't you want a hybrid?" he said.

NEXT: Lamborghini
Last updated March 15 2011: 6:51 AM ET
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