Reuters: An old pulp and paper mill in the US north-east is being turned to the production of much-vaunted second-generation biofuel, its owners hoping to become a pioneer in the production of green jet fuel. A venture capitalist along with researchers from the University of Maine are hoping to be the first to produce commercial viable quantities of bio-butanol from the state’s forestry industry wood waste. The big hopes for biofuels lie in so called second generation techniques, where …