Inter Press Service: Studies debunking the environmental benefits of ethanol have made little impression in this country, which is betting on bio-fuels as the green answer to coal and oil to help clear its increasingly smog-filled skies. But even as the ethanol dream survives unscathed, economic realities of surging food prices and global inflation are beginning to bite. Prices for non-grain feedstock as cassava promoted here as a safe alternative to the conversion of precious corn into ethanol …