Description With the Windradflügel ReUse Challenge, Energie Burgenland was looking for the best, most creative, innovative and sustainable ideas, concepts and designs on the question »How can we reuse old wind turbine blades?«. Energie Burgenland is a pioneer in green electricity production in Austria. An important component of the innovation strategy is #circular economy: circular business models – strengthening the circular economy in our energy world. The company faces the challenge of replacing aging wind turbines with new ones. The recycling/reuse of materials is a component of the sustainability concept. The wind turbine blades are made of extremely robust, valuable material (GRP), which is why they want to re-use them. A total of 85 ideas were submitted.