The Malian musician Inna Modja is not only a UNCCD Land Ambassador, but also the protagonist of the documentary 'The Great Green Wall'. She takes us on an epic journey along Africa’s ambitious project to plant trees across the entire Sahel region and thereby hold back the expansion of the Sahara desert. The project, which is now being implemented in more than 20 countries across Africa, is a symbol of hope in the face of one of the biggest challenges of our time – desertification.