Fertilizer is also usually synthetic, made from natural gas and petroleum and energy intensive. Whatever happened to using miscanthus as a feedstock? Did the science not pan out or did Archer Daniels Midland/Monsanto triumph on the hill?
http://deltafarmpress.com/corn/high-yielding-miscanthus-ethanol
http://deltafarmpress.com/corn/high-yielding-miscanthus-ethanol