In one of the latest publications of the German Federal Environment Agency (Umweltbundesamt,UBA),an almost completely greenhouse gas (GHG)-neutral society was modeled considering significant emission reductions in all GHG relevant sectors and per-capita emissions of just 1 ton of CO2eq.The study shows that future GHG-neutrality in Germany is technically achievable.This implies,however,that the entire electricity,heat and transport sectors as well as the major part of the industrial sector need to be fed completely from renewable energy sources.In a study which was published in 2010 the Federal Environment Agency already showed that an electricity supply based on 100% renewable energies in 2050 is possible in Germany.Assuming a sustainable use of biomass,its use was restricted to waste and residues (cascade use) in 2050,which limits its contribution as energy source to the entire system.The German potential for hydropower and geothermal energy use is also limited.That is why photovoltaic and especially wind power are important renewable energies that will play the key role in a GHG-neutral energy supply.A GIS-based study which was also published by the Federal Environment Agency in 2013 showed that in particular the potential of onshore wind energy has been underestimated so far in Germany.Even if the realizable potential is distinctly lower - because on the one hand certain considerations requiring case-by-case decisions could not be reflected in a sensible way,on the other hand economic framework conditions or local acceptance levels were not taken into account - it becomes clear that onshore wind energy generation confirms its key role in the renewable energies portfolio in Germany.