No one here seems to have considered the net energy problem of hydrogen technology. Hydrogen will always be the fuel of the future for the simple reason that it takes 1.3 units of energy to create 1 unit of hydrogen energy. Hydrogen also can never be stored in a container without leakage because it is the simplest molecule. It can never be used as a replacement for fossil fuel as a transportation fuel because of scalability. The expense and complexity involved with building infrastructure to support hydrogen technology is ridiculous. Moreover, the platinum contained in hydrogen fuel cells will be depleted from the earth long before enough are built to meet demand. If anyone wants credible references to back these claims, I have plenty, email me for them if you wish.

Hydrogen is a red herring and will never be a scalable, practical alternative to fossil fuel because its existence depends completely on a cheap fossil-fuel economy in the first place.