Thank you very much. It's a good question.
Today's technology is available for all types of vehicles from light duty to heavy duty vehicles. I think what is important is trying to identify what is the best case—the use case. Which application.... At the end of the day, it's electrification. Whether it's a fuel cell or a battery, both are electric vehicles. It's a matter of how you bring the energy to the vehicle, how you store the energy on board the vehicle.
Each use case will differ. When you look at heavy duty, the bigger the vehicle is and the larger the payload that you have to carry, then hydrogen makes more sense because you don't have to compete with a very large battery weight against the goods you want to transport. Duty cycles are very important. If you have a taxi, which operates multiple shifts with little time to recharge, hydrogen makes sense. It's a mixture of the use case, the payload and the duty cycle that you want to have.
The technology itself is available. You can have fuel-cell engines, ranging from powering a car all the way to a train. It's just a matter of finding ways of best application based on the use case.