That's a very good question.
I think we need to separate the vehicle from the energy source, that is, the the vehicle from the fuel cell. It is all about manufacturing. Volume will bring down the price and all of a sudden, the price of a fuel-cell engine will be comparable to manufacturing, or cheaper than manufacturing, a diesel engine.
Your question addresses the energy. With electric, you directly use electricity to recharge a battery. In a fuel-cell electric vehicle, you use energy carrier hydrogen to store the energy on board the vehicle.
Hydrogen can be produced two ways. Today I would say 95% of the hydrogen produced worldwide comes from a derivative of natural gas, and there are production plants in Canada here. This way, you don't reduce those emissions, so you have a carbon-intense hydrogen. The challenge is to be able to reduce that intensity by doing carbon sequestration. In Canada today, you have companies—and it's already done in Alberta—where you can take a natural gas stream, remove the carbon component during the production of hydrogen and store that or use it in the industrial feed.