1. Introduction 2. Analysis of Today's Energy Situation 3. The Importance of Energy Efficiency Measures 4. Overview of the Most Important Renewable Energy Technologies 5. PV Market Development 6. PV Value Chain and Technology 7. The Astonishing Predictive Power of Price Experience Curves 8. Future Technology Development 9. Future Energy Projections : the 150 Peta-Watt-Hour Challenge 10. Likelihood of and Timeline for a World Powered by 100% Renewable Energy 11. Conclusion: The 100% Renewable Energy Puzzle.