[jessaustin]

You can burn anhydrous ammonia in a regular ICE. If we adopt GP's hypothesis that energy is cheap, then it's also cheap to turn H2 into NH3. We already have a robust infrastructure for the manufacture, storage, and transportation of liquid anhydrous ammonia. It does present some dangers to human safety, but so does any fuel.

If cars ever run on hydrogen in significant numbers, they'll actually be running on ammonia.