The discussion about energy perspectives up to 2050 and beyond has started. There seems to be consensus that ambitious climate change mitigation policies are necessary, whereas proposed solutions vary from aiming at 100% renewable energies and setting up appropriate policy frameworks to a mix of renewables with so-called clean fossil and nuclear energy. Provides an analysis of the different approaches and the reasons why there is no sustainable alternative to aiming at 100% renewables and how this vision could come true. An overview and in-depth analysis of a vital debate, describing policy options and their impact on Renewable Energy development and deployment in Europe.