Re: Ban it!
Yebbut....producing that amount of liquid hydrogen and oxygen takes lots of energy. Even if it's done with wind and solar power, those windmills needs lots of fibreglass and concrete, solar panels use highly pollutant generating materials production.
(Yeah, I know, amortisation of pollution if the windmills and solar panels last long enough, the point is few people actually look at the entire chain of events to produce "clean" fuel)