Comment by letsgoyeti
4 years ago
I think most hydrogen proponents are pushing for it to replace hydrocarbons for shipping, planes, and seasonal energy storage, not cars.
There's not a lot of other great options today if we want to decarbonize those sectors because of the energy density required.
Also add trains to that list, mostly because the cost of stringing wire is constant and below certain traffic levels batteries make more sense.
There are 20 other ways to reduce emission in the cases you mention.
Look up different plane designs from the 1970s.
The only reason those designs never took off was because people wanted to trade efficiency for convenience.