In 2007, the U. S. Congress enacted the Energy Independence and Security Act as a result of President Bush’s Advanced Energy Initiative (AEI) chal­lenging the United States to change the way its citizens fuel their vehicles to improve the nation’s energy security. The important message delivered by the AEI was "Keeping America competitive requires affordable energy." The EISA of 2007 is an energy policy act designed to improve energy efficiency and to increase the supply of clean renewable fuels, thereby reducing U. S. energy consumption by 7% and greenhouse gas (GHG) emissions by 9% by 2030. The initiative requires a mandatory Renewable Fuel Standard requiring transportation fuels sold in the United States to contain a minimum of 36 bil­lion gallons of renewable biofuels by 2022, including advanced and cellulosic biofuels and biomass-based diesel. The EISA further specifies that 21 billion gallons of the 2022 total biofuel blends in gasoline must be derived from noncornstarch products. Additionally, the EISA requires that the Corporate Average Fuel Economy (CAFE) standard increase to 35 miles per gallon by the year 2020. Although the EISA somewhat appears to discourage further growth of conventional corn-based ethanol as a blend fuel for the future and instead promotes rapid growth and market expansion of cellulosic ethanol, it still provides ample room for advancement of the U. S. ethanol industry.