How to Kick the Oil Habit

As prices rise, the race for new energy sources--from wind farms to liquid coal--heats up. Get ready for the withdrawal symptoms

If anyone harbored any doubts that hybrid cars are hot, last week the 2005 Tokyo Motor Show put them to rest. Carmakers practically ran over one another promoting their versions in attempts to catch up with Honda and Toyota, the technology's pioneers. Companies such as Mercedes-Benz, BMW, Mazda, Mitsubishi, GM, Volkswagen and Porsche showed new models or talked about plans to sell them by the end of the decade at the latest. On display were not only regular hybrids, the kind powered by gasoline engines mated to electric motors, but also variations adding hydrogen to the mix and a system that puts electric motors...

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