Unge stopper madspild (Youth stop food-waste)A problem-based learning activity to develop solutions in the local community. Especially work together with the concept of UN sustainable goal no. 12. The classes are taught about where, how, and why food waste occurs and investigated in their local community and local environment. The students must then develop their own proposals for how food waste can be reduced, working together with a teacher, local politicians, and experts.Implementing actors: CONCITOs Klimaambassade (Climate think-tank), Association for school-democracy (Foreningen for Demokratiskolen) partnership with Association of people-meeting (Foreningen Folkemødet), association of purchage (De Samvirkende Købmænd), and the Food ministry (Fødevareministeriet) Target audience: 400 school pupils, teachers, municipal officials from Ballerup, Fredericia, Gentofte, Herning, Kolding, Silkeborg, Skanderborg, Vejle participate in the experiment in weeks 36-40 and developed proposals to reduce food waste, which can be included in the green climate transition of their municipality and hopefully in the official Danish effort.On-goingDenmark (municipal - Ballerup, Fredericia, Gentofte, Herning, Kolding, Silkeborg, Skanderborg, Vejle)Prevention(http://sustainable.dk/folkeskole/wp-content/uploads/2021/01/Moduloversigt.pdf) (https://concito.dk/unge-stopper-madspild )XX