tap our cattle reserves.
Feedstock is Methane (natural gas) of which there is about 300 years supply in the world. Even if this runs out, you simply react hydrogen gas (from electrolysis of water) with any carbon-containing compound at high temperature. If all the coal and trees run out, you can substitute environmentalists as the carbon fraction.
we already have their udders hooked up to machines, why not. . . uh, you know. . .
its a biological source, renewable, shut the greenies up since the gas won't go into the atmosphere.
we could get friend with the Phd in flatulence in on it too!
-Justin Kelly