Will Brown directs us to this site, where they sell kits that you can use to convert your existing car into a gas / hydrogen hybrid. It’s a very interesting model.
In keeping with our discussion on economic disruption, these kits enable you to collect your own hydrogen. Hydrogen is extracted from the atmosphere via solar power. Free fuel! Plus, if you don’t collect enough — or say if you need to go on a long trip — you can always switch back to burning gas.

There are bound to be numerous objections to and problems with this approach. I was a bit alarmed by the presence of the tanks reading DANGER! HYDROGEN! stacked on each other in the back of the car, but apparently the hydrogen gas is bonded to a metal and stored in an inert state. (I guess the warnings are only there in gas the gas begins to leak out for some reason, although I’m not clear on how that coul happen.)
Anyway, with what it’s costing me to fill the Jeep these days, I certainly like the idea of collecting fuel for free in my back yard.