Production and utilization of sustainable energy toward maintaining a clean environment is a major challenge. At the same time, the continued depletion of fossil fuels and the global dependency on non-renewable fuels is a chief concern. Moreover, the long-term economic and environmental issues associated with the high utilization of fossil fuel, such as global warming, are also important, particularly in the context of the predicted increase in the global population to around 5 billion by 2050.

Chapter-1 Biofuels: types and process overview.- Chapter-2 Biofuels generation based on technical process and biomass quality.- Chapter-3 Biogas: An Effective and Common Energy Tool-PART-I.- Chapter-4 Biogas: An Effective and Common Energy Tool-PART-II.- Chapter-5 Biogas: An Effective and Common Energy Tool-PART-III.- Chapter-6 Stoichiometric analysis of biogas production from industrial residues.- Chapter-7 Bioethanol Production; Generation Based Comparative Status Measurements.- Chapter-8 Algal Biomass: Potential Renewable Feedstock for Biofuels Production-PART-I.- Chapter-9 Recent trends in biogas upgrading technologies for biomethane production.- Chapter-10 Efficiency Analysis of Crude Vs Pure Cellulase in Industry.- Chapter-11 Significance of process parameters on fungal cellulase production.- Chapter-12 Modeling and stimulation of pyrolysis of teak (Tectona grandis) Sawdust.