Biogas- from waste to fuel makes the readers aware about the process of anaerobic digestion and explains the ways in which the waste is converted to biogas and how further it is upgraded to biomethane. It informs the ways in which the algae is used for biogas production and discusses the impact of biogas technology. The book discusses about the optimization of biogas production in the developing countries and explains what methanogens mean. Also discussed in the book are the strategies for the enhancement of biogas production for second generation lignocellulosic resources and the opportunities and challenges for the industrial application of combined production of biogas and bioethanol. It also provides the meaning of biomethane and elaborates on the various process disturbances in agricultural biogas production, further discussing the various perspectives of biogas conversion into bio-CNG for use as a fuel in automobiles.