This monography is is prepared based on the syllabus of the subject "Renewable energies", for the University students. This book includes all of the fundamentals and applications of biofuels and bioenergy produced from biomass; renewable feedstocks, their production, availability and attributes for biofuel/bioenergy production; types of biomass-derived fuels and energy; thermochemical conversion of biomass to heat, power, and fuel; biochemical conversion of biomass to fuel; environmental impacts of biofuel production; economics and life- cycle analysis of biofuel; value-added processing of biofuel residues; Sustainability Assessment and Market Development.