1 acre of PV != 1 acre of biofuel crops. Biofuels require at least 20x more area. If we stopped growing all food we could just about cover our energy needs with

1 acre of PV != 1 acre of biofuel crops. Biofuels require at least 20x more area. If we stopped growing all food we could just about cover our energy needs with biofuel. PV is the way to go. http://thinkprogress.org/climate/2013/03/27/1783781/for-powering-cars-solar-is-orders-of-magnitude-more-efficient-than-biofuels/?mobile=nc http://thinkprogress.org/climate/2013/03/27/1783781/for-powe... As for actual cost, SolarCity's business model seems to indicate that the net present value of solar is cheaper than residential grid electricity, which is in turn cheaper than gasoline/diesel. And solar prices keep plummeting.