I'm sure there is some kind of desert rat or armadillo that is endangered out there on the Texas prarie.
The process has been known from the turn of the century and used widely in countries that didn't have access to oil.It is an energy intensive process, so that was where the cost was. I though maybe they should make it with solar furnaces in Arizona or somewhere like that. If you do some "googling", you can even find a place that will sell you a unit to make it yourself if you have access to coal. The one I saw before would fit on an 18 wheeler and could be hauled anywhere.