This report published by the OECD (Organisation for Economic Cooperation and Development) emphasises many of the downsides of biofuels. These include: Land use conflicts between growing crops for fuel and crops for food Environmental damage particularly in tropical areas (where biofuels can most readily be grown) Poor CO2 and other credentials for many biofuels when compared with fossil fuels Little potential for reducing oil dependence and improving national fuel security. Lack of cost effectiveness