With Toyota and Hyundai both recently announcing production hydrogen fuel cell vehicles, it seems like the zero emissions, no compromise vehicle is finally here. As usual, the reality is a little more complex than the public relations announcements. The American car buyer likes big, gasoline powered vehicles, even in times of gasoline costing well over $3 a gallon. This is seen in sales of the 268 horsepower Camry selling over 400,000 units last year, but the electric only Nissan Leaf selling...