Why does cellulosic ethanol leave a lesser carbon footprint?
Cellulosic ethanol leaves a lesser carbon footprint because less fossil fuel is needed to produce it. In fact, to produce cellulosic ethanol, waste biomass can be used, rather than fossil fuel, further lessening the carbon footprint. Farming cellulosic biomass also requires less energy than corn. Finally, year-round crops store carbon in the soil through their roots, and many have extensive root systems.
