Alternative feedstock technologies are not progressing fast enough and corn-based ethanol is not being produced in sufficient quantities for U.S. industry to meet the Renewable Fuel Standard (RFS) 2022 mandate, says the Energy Information Agency (EIA) in its annual forecast of domestic energy production. "The key risk factor is rate of development of cellulosic biofuels technology," the agency said, adding that near-term growth of cellulosic is "certainly a question mark." EIA said U.S. producers will only blend about 30 billion gallons of biofuels, including corn-based ethanol, by 2022, 17% short of the mandated 36 billion gallons.