Biofuels are fuels extracted or produced through biological processes or other anaerobic methods of fuel production. They are renewable sources of energy. Some common biofuels include bioethanol, biodiesel, biogas, etc. One of the many prominent advantages offered by biofuels is that they generate energy by undergoing complete combustion. Biofuels are therefore considered the future of energy. The data collated in this book presents an international perspective on the technological development of biofuels. The chapters compiled herein cover an array of significant topics ranging from fundamental concepts and theories to the modern applications. This book will serve as a valuable source of knowledge for graduates, post graduates, researchers and students in this field.