Hydrogen fuel cells for vehicles are getting a boost as General Motors and Honda form an alliance to develop the technology over the next seven years. One obstacle is the platinum catalysts needed, costing thousands of dollars per vehicle and making them more expensive than even electric cars. "At GM, we believe in hydrogen fuel cell technology as one of several possible alternatives to more traditional forms of propulsion, to help reduce petroleum dependence. However, the cost of such technology has not come down as far as it must to become more commercially viable," said GM Vice Chairman Steve Girsky.

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