evidence: Lake Constance is a stunning freshwater lake located at the northern foot of the Alps, bordered by Germany, Austria and Switzerland. Lake Constance and is the second largest freshwater lake in Central Europe, covering an area of approximately 536 km². Lake Constance is not only a geographical crossroads, but also an oasis of natural beauty, cultural richness and recreational activities. [...] Local Communities 3,9 million People live, work and relax in the Lake Constance region, which covers an area of around 12.500 square kilometers. 4,5 million People drink Lake Constance water and up to 50.000 boats are based on the lake. [...] The Lake Constance Foundation is a private organisation for environmental protection and nature conservation in Radolfzell, Germany. The project-oriented foundation works towards more sustainability and nature protection in the international Lake Constance area and beyond. In the fields of agriculture & food, energy transition, nature and water conservation, business & biodiversity and environmental education, the Lake Constance Foundation focuses on both the big picture and concrete implementation. In over 40 model projects, the LCF has shown that sustainable development does not have to remain an empty phrase, but can be put into practice.