I agree pretty much with what my colleague from General Motors said. I'd just like to add one or two elements.
I think you're right that natural gas can be an attractive fuel. Actually, we've had natural gas vehicles in the market for a few years. The limiting factor, and this also was just mentioned, is really infrastructure. We do not see the natural gas infrastructure just being there and not necessarily developing.
It's different for heavy-duty vehicles. We see natural gas certainly more in trucks, for instance. There is one technological difference, of course. Both battery-electric and hydrogen fuel cell-electric are the only technologies that give you really zero emission from tank to wheel, and give you the ultimate efficiency benefit from well to wheel. That's something that the combustion engines—and natural gas is still a combustion engine—cannot give you.
Of course, for us what is important is that the customer will decide, at the end of the day, which technology will be successful. That's why we have seen with natural gas not really the breakthrough that you might have wanted.