That semi truck is pretty cool. I've heard of Tesla's (Nikola) natural gas combustion engine powering a generator, powering electric drive before. Not zero emission but a much better use of "hybrid" technology. The truck referenced above is a step further out. But it isn't zero emission. That hydrogen has to come from somewhere. I assume - I know, correct me if I'm wrong - it comes from electrolysis of water which takes electricity and fossil fuel. I do believe the internal combustion engine will be a thing the past at some point, which is fine. It remains to be seen how that looks. But the current technology doesn't use logic, reason, value,dependability, cost, durability, etc as part of the analysis for electric locomotion. It is replaced by the liberal ideology of "I need to feel better about myself" technology. Eventually, the market will decide what works, it always does. Too bad feel goodism is getting in the way.