The Renewable Fuels Assn. (RFA) says 3 billion gallons of ethanol production will come on line in 2007, "giving supplies an opportunity to come into balance with demand," according to an RFA report to the National Corn Growers Assn. (NCGA.) RFA said the industry is also making strides to move beyond corn-based ethanol to varieties which can be refined from corn stover and cellulosic feedstocks, but corn will remain the foundation of ethanol production.