Hydrogen would be generated from magnesium and steam.

Two hydrogen generators based on reactions involving magnesium and steam have been proposed as means for generating the fuel (hydrogen gas) for such fuel-cell power systems as those to be used in the drive systems of advanced motor vehicles. The hydrogen generators would make it unnecessary to rely on any of the hydrogen-storage systems developed thus far that are, variously, too expensive, too heavy, too bulky, and/or too unsafe to be practical.