Well, it isn't quite practical YET. But like fusion, it IS becoming closer to practical every day, whereas fusion is still a pipe dream.
But the GOAL of both are worthy--- fusion because it will produce unlimited clean energy; and hydrogen because once made practical, unlike EVs which merely STORE energy temporarily made elsewhere, often by polluting means which defeat the purpose of green energy, hydrogen PRODUCES energy within the car wherever it goes and once exhaused, can be "refilled" much like a gas car, then you are back on the road again! No hours of waiting while the car recharges.
And unlike an EV which must carry almost half its weight just in batteries, the hydrogen car produces its own energy from hydrogen and oxygen, both plentiful, with the only exhaust byproduct being WATER.
And we can do it. The only technological barriers left to resolve are:
- Cost. Still too expensive a process for the general public.
- Hydrogen. While hydrogen is cheap, simple and bountiful, here on earth, it is mostly bound up combined with other things and we need to resolve a way of extracting it in larger quantities that is both affordable and does not itself produce pollution.
But these things are doable. The technology is there, and like most of the technology we use today and take for granted like cellular phones, they too were once considered too expensive and impractical, but this is the future of transportation.
