How much money does these efficient vehicals cost to buy or make?
Don't ask. The car-makers don't like to say what it costs to make a fuel-cell car. With tens of millions invested in development and only a few cars produced, the costs per car are currently astronomical. Estimates of $1 million per car are common. Honda has estimated that it might get the retail cost of a fuel-cell car down to $84,000 by 2018 if all goes well.
