Not sure what your gripe is  Hydrcracking uses more energy than it generates as well  Are you suggesting people shouldnt know about electrolysis because it obeys the law of conservation of energy  Oh and you dont burn the sea water you burn the gas that comes off the sea water after a current has been applied  Many of the methods of generating H mentioned in the article are less efficient than electrolysis or are even purely theoretical  engineering cyanobaccilus to make hydrogen etc