Furthermore, Prof. G., on the world scale the use of hydrocarbon fuels for dismantling nuclear reactors is incredibly tiny. It's so tiny that even if we ran out of fossil fuels we could easily manage the reactor disposal problem with biodiesel for the relatively small amount of hydrocarbon liquid fuels needed for such activities. Biodiesel won't scale to replace our current lifestyle but if we need only a few tens of million of barrels per year, we can easily produce that, and in a sustainable manner too.