This book introduces readers to second-generation biofuels obtained from non-food biomass, such as forest residue, agricultural residue, and waste wood.The first-generation biofuels ethanol from sugar or corn and biodiesel from vegetable oils created to replace petroleum are already in the market, with limited success. However, alternatives to petroleum must be technically feasible, economically competitive, environmentally acceptable, and easily available. The goal of this book is to introduce readers to promising second-generation biofuels obtained from non-food biomass, such as forest residue, agricultural residue, switch grass, corn stover, waste wood, municipal solid wastes, and so on. This book strives to serve as a comprehensive document presenting various technological pathways and environmental and economic issues related to biofuels.The first-generation biofuels ethanol from sugar or corn and biodiesel from vegetable oils created to replace petroleum are already in the market, with limited success. However, alternatives to petroleum must be technically feasible, economically competitive, environmentally acceptable, and easily available. The goal of this book is to introduce readers to promising second-generation biofuels obtained from non-food biomass, such as forest residue, agricultural residue, switch grass, corn stover, waste wood, municipal solid wastes, and so on. This book strives to serve as a comprehensive document presenting various technological pathways and environmental and economic issues related to biofuels.The world is currently faced with two significant problems: fossil fuel depletion and environmental degradation, which are continuously being exacerbated due to increasing global energy consumption. As a substitute for petroleum, renewable fuels have been receiving increasing attention due a variety of environmental, economic, and societal benefits. The first-generation biofuels ethanol from sugar or corn and biodiesel from vegel³u