Okay.
On another topic, then, fuel cells for vehicles, everybody is looking at hybrid vehicles, and that's great, but we don't see very many vehicles that run on just a fuel cell, just a battery, because you can't go very far in them. Is there any research done on the hybrid vehicles being able to be run on battery when you're in the city and then you can fill it up with gas when you want to go cross-country, which would save gas and would also save GHGs?