[QUOTE] One would "only" have to develop a bacterial strain that synthesized sunlight and co2 into a useful hydrocarbon to eclipse Mr Gates.[/QUOTE] magic hydrogen from the zero-point quantum vacuum, then? (Not that that's totally unbelievable - virtual particles are as real as ... err .... other unreal things; paging Ivan... Anyway, what's wrong with yeast for this sort of thing? Ethanol's a pretty "useful" hydrocarbon.