June 10 -- What kind of clean engines do you think will be in cars in 25 years?
Ford Motor Co. CEO Bill Ford said he expects three quarters of the light vehicles to be using hybrid-electric technology and the rest to already be running on hydrogen.
Among automakers, the smart money is betting on power plants that use hydrogen for the long haul.
But carmakers are hedging their bets on what comes between now and then. And they're quibbling in Washington over potential tax credits.
Most Japanese automakers, led by Toyota, prefer hybrids, which burn fuel to make electric power.
Europeans tend to prefer diesels.
Even so, Ford, General Motors and DaimlerChrysler also have vehicles that use hybrid technology. And Toyota already has a diesel that meets tough federal clean-air standards for 2007.