An excellent article at www.biofuelsdigest.com giving a 30,000 foot view of the (US) military’s thinking on biofuels and an explanation of the sometimes tortured logic it uses. Worth reading.
“The Navy has a plan to buy military biofuels, starting in 2016, at a price that is cost-competitive with conventional fuel. Since this is new technology, they know that someone is going to have to build out a commercial scale refinery that can generate the economies of scale, and will need four years for design, permitting, construction and commissioning.”