Once hailed as a climate savior , biofuels are now the subject of widespread criticism . FAO economist argues that it is important to distinguish between different biofuels . For example ethanol and biodiesel have very similar impacts on global warming but they differ in their environmental impact.
Once hailed as a climate savior , biofuels are now the subject of widespread criticism . FAO economist argues that it is important to distinguish between different biofuels . British chemist believes that biofuels can work , but only on at a very local level .