Contents: 1. Classification of Energy Sources 2. Contribution of Renewable Energy Sources in Agricultural Sector 3. Biomass Utilization for Bio-Fuel Production and their Application 4. Biogas 5. Gasifier 6. Biofuels 7. Solar Energy, Collection and Their Application 8. Solar Energy Gadgets 9. Solar Photovoltaic System (SPV) 10. Wind Energy and their Application 11. Other Renewable Energy Sources 12. Energy Management 13. Advances in Renewable Energy Sources