It's time to transition - Oil is running out, and biofuels can't replace it. Hydrogen production is energy negative, in that it takes more energy to make it than you get from burning it. Oil Shale is also energy negative. Would transitioning to a more energy effiecient transport system not be sensible? I would have thought now would be the time to start building high density mixed use walking and cycling suburbs linked together by efficient public transport, and fazing out the private car. The alternative is just to allow a systemic meltdown.