The U.S. consumes 370 million gallons of gasoline in a single day. Assume that energy crops raised for fuel yield cellulosic ethanol is 1500 gallons/acre per year. However, due to differences in energy density, ethanol provides roughly 2/3 the miles per gallon attainable from gasoline. How many acres of land would need to be cultivated each year for biomass crops to replace 20% of the gasoline used with cellulosic ethanol? (assume that the biomass land has only a single crop harvest each year).