This well sourced & the authors conclusions are in plain site. A bit inflammatory in style maybe but still solid. There are reports coming out of Mexico that the lack of seed corn caused by US corn producers snapping up the supply has caused the price of corn to soar. So there are already some very real effects being felt. Most discussions of crop fuel sources do not take into account the full cost of production. Phosphate fertilizer run off, water table depletion, lack of sustainable soil chemistry, pollution from the conversion process, the morality of limiting food production for fuel production (a very real cost if you ask me) just to name a few. From the union of concerned scientists site(there is also a biomass energy 101 with good info on their site). "Another important consideration with biomass energy systems is that biomass contains less energy per pound than fossil fuels. This means that raw biomass typically can't be cost-effectively shipped more than about 50 miles before it is converted into fuel or energy. It also means that biomass energy systems are likely to be smaller than their fossil fuel counterparts, because it is hard to gather and process more than this quantity of fuel in one place. This has the advantage that local, rural communities—and perhaps even individual farms—will be able to design energy systems that are self-sufficient, sustainable, and perfectly adapted to their own needs."