Um, there will be many transition, uh, solutions in the next decade or two decades. Uh, hybrids, plug-ins, um, range-extended vehicles, uh, hydrogen vehicles, which are electric cars with, uh, on-board generators. Um, there will be electric cars with hybrid, uh, with hydrogen range extenders. There will by hydrogen-burning internal combustion engine cars. There will be, um, fuel made out of algae, or out of biomass, or artificially-created, uh, fuel. Um.
But the end solution is electric. 'Cause it's just efficient. So you have a powerplant which is efficient. Or you have, um, I don't know, uh, wind farms, uh, or solar panels or whatever, and, uh, the best way to get that energy where it's generated into transportation is just electric.
Uh, hydrogen cars are nothing more than electric cars with a different storage system instead of batteries. Which are now maybe comparable to batteries, but as batteries improve, the other forms of transportation will have less-and-less sense. So I think, even today, hydrogen makes really no sense. It's just an engineering exercise. And as the batteries advance, the solution will be clearer and clearer. So I think that there is no way, there is no sense for any other forms of energy storage inside the car. Except, I don't know, if you manage to, to shrink down a cold fusion, so that it could fit into a car. But, otherwise, battery-electric vehicles are the only sensible choice.