H storage is a problem as people here suggest but not insurrmountable. Storing it in hydride crystals was a pioneering offering but new ways are in the wings.

Production of H fuel while driving is advantageous. Then one would pull into a sevice station to have their H compressed with electic pumps - hopefully powered by sustained fusion reactors.

One energy alternative area I feel we should stay away from are mini black hole manipulation. Even the dimmest bulb could figure out why.

If we do want to experiment in this area, lets wait until we can do it 4.2 light years away from Earth, just in case their is a super nova "incident".