This book highlights recent advancements in such an important topic, through contribution from experts demonstrating different applications in 'day-to-day' life, both existing and newly emerging biological technologies, and thought provoking approaches from different parts of the world, potential future prospects associated with some frontier development in non-conventional energy sources. It covers different aspects of cellulosic and lignocellulosic biomass; Cellulosics Biorefinery; Algal Biofuels; Biodiesel; Bioethanol; Microbial Fuel Cells; Biofuel cells; and biohydrogen production. This book is a comprehensive and informative compilation for international readers, especially undergraduate, post graduate students and researchers.