Sustainability is very much emphasized as a teaching topic these days, but it is not a separate topic, but a guideline that every person - young or old - should follow in their everyday life. However, the task of teaching - in our case, teaching GFL - is to integrate this guide into the lesson topics in an age-appropriate way. We have worked on the aspect of sustainability in our video series "Goethe grün" on the topics of waste separation and clothing. The highlight of this series is our video on Johann Wolfgang von Goethe, after whom the green sauce was named.