I agree that the hydrogen generator is the future for electric vehicles. Excess sunlight through voltaic cells can be stored as hydrogen from water electrolysis then later be used to generate electricity again.

The technology exists but, as has been noted, the infrastructure is virtually non-existent.

None of this solves the jet engine problem. If jet engines could be run on hydrogen I imagine that they would already be in use. The trick would be if someone could find a way to burn carbon dioxide with hydrogen to make it work with jets. As long as the carbon dioxide came from the air it would be 'carbon neutral', or is this just chemical perpetual motion?