From what I read it has a closed carbon cycle and may actually sequester additional carbon in roots for certain perennial crops. Also what about methane from different sources like landfills and wastewater treatment?
Is this all BS or just not doable because of cost? It a good thought that we could grow and poop some of our own energy sources.
Anybody?
Now onto to hydrogen. It is a pain the butt to handle, distribute and store. Furthermore unless you are planing to burn pure oxygen with it in lieu of air your are still going to get a lot of the same pollutants we presently get. Gasoline is a hydrocarbon and the theoretical byproduct of it's combution is theoretically Water and Carbon DiOxide. However since air (which is mostly Nitrogen and lots of gases other than oxygen)is used as the oxidizing agent we have all kinds of byproducts mostly Nitrous Oxides (NOx).
So it is a swell idea but I seriously doubt anything will happen in the next couple of decades.