Due to the depletion of fossil energy resources and the threat of global warming, the world faces the imperative of a complete transformation of its energy system. However, the builtup of a renewable energy system itself requires non-renewable resources, that is fossil fuels and metals, which will become more scarce during the coming years and decades, therefore possibly slowing and constraining the expansion of a renewable energy system. Coming resource scarcities might impede the growth of a renewable energy system not only directly but also indirectly: A scarcity induced slowing of GDP growth risks to translate into a decline of investments in renewable energy systems. Against this background, the project “Feasible Futures” assesses (1) physical requirements of renewable energy systems, (2) likely geological and polito-economic availabilities of key resources, (3) the effect of resource scarcities on the energy transition in Austria and (4) risks and feasibilities of Austrian and EU-policies in the field of renewable energy systems. Based on this assessment, the project attempts at analyzing different energy transition scenarios, resulting in a discussion of policy recommendations with a focus on macroeconomic frameworks and innovative socio-economic regulations.