Something like this could light the hydrogen fuse in the US.
“I see the Water-Go-Round as a seed,” he said, “and when you add water to a seed,
it grows. This seed is going to grow into other ferries, fishing boats, cargo ships. This is the seed that’s going to do it.”
https://www.sfchronicle.com/bayarea/amp/Bay-Area-to-build-first-hydrogen-fuel-cell-ferry-13376358.php?__twitter_impression=true