"Tin Drum" director Volker Schlöndorff's new film is about "alternative Nobel" winner Tony Rinaudo, an Australian scientist who helped reforest many parts of Africa's Sahel region.
As people fell trees to get wood for cooking, Mali's trees are disappearing at rapid speed. A reforestation expert who has been dubbed 'the forest maker' is working with farmers to restore the country's woodlands.
