True, but that would require building expensive infrastructure that would sit idle for most of the time while we wait for the surplus - assuming we talk intermittent renewables.

Sure enough, hydrogen fuel cell is cleaner than ICE, my objection was to the form of transportation that might require so much power an ICE car would be a better alternative (but not an ICE air taxi, to be clear)

Cars would be better, but both can coexist

From an ecological perspective, they can not, and that's what this "invention" pretends to be about. Also, cars too are far from perfect, but at least better than this monstrosity