Over the last few decades increased energy demand across the globe coupled with rapid depletion in fossil fuel reserves has renewed interest in development of alternative energy sources. In growing economies in addition to energy security there is also concern regarding environmental protection particularly from fossil fuel usage in the transport sector. In this regard befouls have emerged as highly promising sources of alternative energy by bringing energy security, revitalizing rural infrastructures and reduced environmental impacts as compared to fossil fuels. Consequently extensive research and development worldwide is focused on befoul production using biomass. This book on Befouls provides state-of-the-art information on the status of befoul production, related environmental, social and economic aspects and recent trends in the field.