[toomuchtodo]

Why would the airport vehicles not be more efficient battery vehicles? Charging infrastructure is then of no concern, and baggage trollies and safety trucks are all low speed/high torque applications electric vehicles we're designed for.

Most pushback tugs are already transitioning to all-electric, and have a very low duty cycle (push/pull a few aircraft, go plug in to charge).

The electricity->hydrogen->electricity cycle is terribly inefficient. Batteries are the answer.