There are many types of biofuels, and they are all used in different ways. They are most often used for transportation purposes, usually blended with gasoline or diesel fuel, but they are also used to generate electricity and provide heat for residential and industrial use. Biofuel consumption may be as simple as throwing a log on a fire or as complex as burning a combustible gas derived from plant matter in a combined-cycle electricity-generating unit. Biofuels describes the most common types of biofuels and biofuel technologies and seeks to identify both the advantages and disadvantages associated with their use. This new, full-color book describes the ways that biofuels are used and the technical, social, policy, and environmental consequences of large-scale consumption.