Asia Times: Studies debunking the environmental benefits of ethanol have made little impression in China, which is betting on biofuels as the green answer to coal and oil to help clear its increasingly smog-filled skies. But economic realities of surging food prices and global inflation are beginning to disturb the ethanol dream. Prices for cassava and other non-grain feedstock promoted in China as a safe alternative to the conversion of precious corn into ethanol fuel are quickly rising. …