The potential future fluctuations in energy security and potential climate change impacts require an emphasis on clean and renewable energies to safeguard the environment as well as economic livelihoods. The current recalcitrant nature of biomass processing has led researchers to find the most suitable technique for its depolymerization, as well as various strategies to pretreat the biomass which include physical, thermochemical, and biochemical methods and a combination of these. Biomass Energy for Sustainable Development examines how optimal biomass utilization can reduce forest management costs, help mitigate climate change, reduce risks to life and property, and help provide a secure, competitive energy source into the future.