[jyl]

Hybrids will be big, I definitely believe.

As for hydrogen, I think it depends a lot on government policies. Nationwide infrastructure for a new transportation method or energy source is awesomely expensive to build (think about how much it cost to build the freeway system, light rail systems, etc).

Not sure the likes of Chevron and General Motors will find it profitable to make the investment in the next decade - the oil companies will make more profit with the combination of ever-higher oil prices and national dependence on oil, and the US car companies are so far behind on alternative fuel technology that they may find it safer for the US to stick with gasoline.

If the government encourages the development of new transportation and energy sources, we might make the transition more smoothly and less painfully.