Everyone is trying to squeeze a few more miles out of each precious tank-full. But among the special-edition Ferraris, bizarre Cadillac studies and a whole new crop of gas-guzzling SUVs, not all that many people were talking about cheaper and cleaner ways of getting around. Now many automakers have put much money and effort into building a greener car. However, they have not started this without a little pushing by the government. Facing clean-fleet laws …showed first 75 words of 1079 total…

…showed last 75 words of 1079 total…what DaimlerChrysler CEO Juergen Schrempp calls "the great big alternative," it'll be a while yet before this technology is advanced enough to replace gasoline-powered cars as a whole. The first models will roll out in a few years, but they'll be expensive and hard to find a filling station for. Industry analysts predict that by 2010, the market will be ready; another ten years, and half the cars sold in the world could run on hydrogen.