Scientific American: A U.N. panel said today that biofuels’ effects on air and water have not been sufficiently explored despite growing global production. The U.N. Environment Programme’s report concludes that so-called lifecycle assessments must go beyond calculating greenhouse gas emissions and consider how agricultural production of feedstocks affect the acidification and nutrient loading of waterways. “The available knowledge from life-cycle-assessments … seems limited, despite the fact that …