Biofuels has come under a concerted media campaign alleging that they are all unsustainable and have adverse impacts. Some biofuels can be harmful to the environment but most biofuels provide a positive energy balance, can play an increasing role in reducing transport emissions, can be developed from feedstocks without impacting food production, can be grown on land without impacting delicate ecosystems or water use, can help alleviate poverty in developing countries.(Source, World Biofuels Markets website)