The city of Carmel, Ind., has vehicles for plowing snow, salting streets, and carrying landscaping machines. But just one cherry-crimson pickup can do one thing no other motor vehicle can: deliver its have hydrogen.

A 45-kilogram metal box sits in the mattress of the do the job truck. When a driver starts the motor, the gadget routinely begins concocting the colorless, odorless fuel, which feeds into the engine’s intake manifold. This stops the truck from guzzling gasoline until finally the hydrogen supply operates out. The pickup has no fuel-mobile module, a conventional element in most hydrogen automobiles. No high-force storage tanks or refueling pumps are desired, both.