this is great, but I have concerns. How cheap and easy can we get these enzymes? We could be using cellulosic alcohol fuel right now if the enzymes weren’t so expensive. How easy is it to separate the sugar? Are we going to have to do more industrial farming to provide feedstock. The corn based ethanol that currently gets touted as green is an ecological nightmare and a economic joke. Have they gotten some higher quality fuel cells that degrade when encountering small amounts of impurities? Hydrogen is hard to store too. Seems good, but don’t hold your breath.