Ethanol advocates are working to prove cellulosic ethanol's central role in reigniting consumer interest in renewable fuel sources amid skepticism over the use of corn and other food products for biofuel production. Peder Holk Nielsen, CEO of Novozymes, brushed aside concern that the cellulosic ethanol process may be harmful to farming, saying that half of the global fuel demand by 2030 could be met using less than 20% of agricultural waste. The Renewable Fuels Association stated in its 2013 annual report that advances in technology and productivity in the industry "are ensuring that ample supplies of grain are available for domestic and international use as food, feed and fuel."

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