Cellulosic biofuels are thought by many to hold the key to increased benefits from renewable biofuels because they are made from potentially low-cost, diverse, non-food feedstocks. They could also potentially decrease the fossil energy required to produce ethanol, resulting in lower greenhouse gas emissions. This book summarises the current state of knowledge regarding potential biomass feedstocks, production and marketing constraints, processing technologies and the economics of biomass from field to fuel under current and hypothetical policy circumstances.