Technology

Hydrogen would also work well for ships, trains, and to some extent trucks. Basically anywhere that requires long distance travel without infrastructure in between where batteries just don't have the range or power to weight ratio to reach - at least not efficiently. And hydrogen is also specifically better for things connecting to a central transport hub, where the hydrogen production and storage and refueling can be centralized to minimize the infrastructure buildup and maximize production and storage efficiency. These would include ports, airports, trainyards, warehouses, sufficiently large bus terminals, basically everything except cars. And as a bonus it doesn't require stripping the earth or rare metals, sometimes mined by slave and child labor.