THE GREAT GREEN WALL is The ambitious project to grow an 8,000 km wall of trees stretching from Senegal to Ethiopia. This belt must fight against the progressive desertification of the region due to climate change but also to avoid growing conflicts and massive migrations. Malian musician Inna Modja accompanies us on this musico-ecological journey along this great green wall and helps us to understand what is no longer just an African but global issue!