Could hydrogen vehicles take over as the 'green' car of choice?

Now that car makers have demonstrated through hybrid vehicle success that consumers want less-polluting tailpipes, they are shifting even greener. In 2015, Toyota will roll out the first hydrogen fuel-cell car for personal use that emits only water. An article in Chemical & Engineering News (C&EN), the weekly newsmagazine of the American Chemical Society, explains how hydrogen could supplant hybrid and electric car technology -- and someday, even spur the demise of the gasoline engine.