General Motors is most bullish on [fuel cells].
"We're going to prove to ourselves and the world that a fuel cell propulsion system can go head to head with the internal combustion engine," said Lawrence D. Burns, G.M.'s vice president in charge of research and development.
He said that by 2010, G.M. will have designed a fuel cell car that can go as far on a full tank and is as durable as a gasoline car. Some financial analysts are skeptical that G.M. will have even staved off bankruptcy by then.
