In the current issue, we turn our focus to sources of renewable energy: How can they help us achieve our climate targets, and how can we best master the substantial challenge of financing projects in this area? In the wake of the earth-quake catastrophe in Japan, this issue's topic is extremely relevant. In this respect, focus is laid upon the German market for renewable energy. Energy generated using hydropower, wind, biomass, sunlight and geothermal heat – has developed dynamically over the past 20 years, making the country one of the leading nations worldwide in the area of renewable energy. In addition, a future outlook for the renewable energy sector as well as for companies in this area is presented.