I drove 1800 miles in a Hydrogen Car

Pretty interesting.  I'd like to know how many KW are required to refuel the tanks, how many KW your get from the hydrogen fuel and how efficient the car is with them.  There are already cars that burn hydrogen and they're very similar to NGV cars.  I've seen arguments that burning the fuel is a better option because it's still eco-friendly and can be retrofitted onto existing cars.  So, it would be cool to see if there is an improvement in fuel efficiency between hydrogen combustion and fuel cells.