Researchers from the Oak Ridge National Laboratory stated that, they have developed a method of using bacteria for grass decomposition to produce isobutanol. Isobutanol is a colorless, flammable liquid, having the chemical formula (CH3)2CHCH2OH. And yes, compared to ethanol, it has two additional Carbon atoms (ethanol only has two). According to the BioEnergy Science Center of the Department of Energy, isobutanol, compared to ethanol, has a higher grade. Isobutanol also has a higher heating value (produces more energy during combustion) and may be blended in any ratio with gasoline. Thus, removing the need for alterations in the tanks or vehicles.