You've heard of cars powered by gasoline, diesel, and electricity. You've heard of hybrids and plug-in hybrids. What about hydrogen fuel cell cars?
Toyota, Honda, and Hyundai are working on bringing them to market as soon as this fall, but they'll have a steep learning curve with Americans who know nothing about them. So I invited Jack Brouwer, associate director of the National Fuel Cell Research Center, to explain the technology on my America Weekend show.