Well we have the technology for hydrogen powered cars. Fuel would be cheaper than ever, more efficient and cleaner. Its just the oil companies don't won't this so they hold back these things or else they would be out of business. Their usual reply to this subject is that "We can not properly house hydrogen in a car", which is BS since we can send a shuttle to space sitting on top of a literal hydrogen bomb. I would like to see this used in the future but....ya know.