I said something similar when a few years back people started bleating about a "hydrogen economy". Errr...hydrogen is not an energy source, it's an energy CARRIER. To use it, you still need an energy source, and that source is going to be, what exactly? Not to mention that the best hydrogen reservoir you can build will lose about 2%/day, simply because H molecules are REALLY SMALL and will leak through just about anything where two pieces of material come together, no matter how good the weld or how tight the fitting.

One of the chief advantages of ICE, especially in transportation is you are able to carry your energy source around with you. Pure electricity (or hydrogen) doesn't allow you to do that, which creates additional logistical headaches, in addition to the inefficiencies mentioned above.

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