I read that, excepting for this possible break through, it takes more energy to separate the hydrogen from water than the resulting hydrogen will produce. Since this is usually done before the hydrogen is stored on the vehicle as fuel, it would be done by the same power plants (in many cases, coal burning) we have now, putting more strain on the grid and producing much the same pollution as gasoline.
I also understand that, except for getting hydrogen from water, most hydrogen is really made from oil and the production process makes some very nasty byproducts.
As for the oil companies and the inventions they have purchased to keep us addicted to oil... come on guys! There are no 100mpg carburetors. Most of the time we use the best "carburetor" in the world, fuel injection. If 100mpg were possible, someone on the list would figure out how to get his FI to produce it. Now there is technology on the horizon that is incredible. Direct injection in a gasoline engine with no throttle blades! Somehow they inject the air and fuel into the engine together; combustion does not depend on the air the engine sucks in through the intake manifold. Before the injected mixture gets a chance to disperse, it gets hit with spark. I am of the understanding that this will increase fuel mileage by something the neighborhood of 30%.
Shiny Side Up!
Bill
'72 442 "Inamorata"