Probably use waste heat from the burning fuel once it's started. Iron is one of the primary constituents of the earth, seems a little far fetched on the surface, but it is interesting.
I think Ludwig von Drake or some other Disney character invented a car that would run on seawater...........but it took several thousand gallons per mile!
exactly, this is very interesting on a couple of fronts. first we have a single researcher finding something possible?????? second, a human sooner or later will indeed find a unapplied energy source for out benefit. it will come, sooner that later. btw, metals do indeed burn at high temps, and are used in all kinds of incendiary devices. how about the pollution angle? some metals like magnesium release toxic gases when burned or heated to high. oh well, good luck to all who endeavor to find that new magic fire.