Because money obviously, but not the way you seem to think.

For the last 150 years, there's been loads of the stuff more or less lying around. It doesn't require much effort to bring to a usable state, and a cup full can move you, your wife and kids, your dog, and your car to the top of that hill in the distance.

Until very, very recently that's been a pretty unbeatable deal.

Now we're just building out the infrastructure and developing the maintenance skills. We're in the midst of a transition.