This book explores in a precise way different concepts about the importance of clean energy in sustainable development are explained seem very amazing. Taking the stock of the fossil fuels and assessing their availability in times to come, the importance of seeking alternatives has been brought out well. Various energy resources like solar, wind, biogas geothermal and ocean’s thermal, wave, and tidal sources of renewable energy can bebest alternative to fossil fuels that has been well explained in this book. The descriptions of various technological challenges involved in utilizing all these sources of energy are the key feature of this book. Utilization of the biogas can be made as a sustainable resource for power generation especially for rural sector which is also highlighted. In this regard, several national level mission mode projects based on biogas undertaken by Indian government are also explained to acquaint readers with success and risk factors of such projects. Pros and cons of all these energy resources are highlighted to indicate the viability of all options. From this, one can gauge the possibilities of seeing these sources turning into a reality, as far as the power generation from sources other than fossil fuels is concerned. Contents : 1. Renewable Energy Sources 2. Solar Energy Basics 3. Solar Technologies 4. Civil Engineering Projects Connected with Energy Source 5. Biomass and Biogas Technologies 6. Smokeless Chulha 7. Geothermal Energy and Its Utilization 8. Ocean Thermal Energy Conversion 9. Fuel Cell 10.Thermoelectric Power Generation and M.H.D. Power 11.Energy Auditing and Green Building About the author Prof. Shailendra K. Shukla is Professor in the Department of Mechanical Engineering, Indian Institute of Technology (BHU). He is also Founder Coordinator of Centre for Energy and Resources Development (CERD), IIT (BHU) and Coordinator of CST UP Incubation Centre for Grass-Root Innovators at Mechanical Engineering Department, IIT (BHU), Varanasi. He has developed research Collaborations with different institutes of UK and Japan in the field of Thermal Engineering and Renewable Energy Technology. He has published more than 100 research papers in high impact SCI/Scopus Journals, 5 books and many book chapters in the books published by Springer, Elsevier and other reputed publishers. He has been placed on board of editors and reviewers of highly repute journals. As a writer and Researcher, he is best known for his ability to put theoretical things in a practical way. Recently he has been conferred FRSC, fellow of Royal Society UK. He has been awarded by Japanese Society for Promotion of Sciences, JSPS Fellow Award 2014-15 for Visiting GIFU University, Japan. A recipient of UGC-TEC Consortium Agreement Award 2010 in Sustainable Energy by University Grants Commission, New Delhi, India, he is also former Pro-Vice Chancellor of Ranchi University.