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Traversing Senegal, Mali, Nigeria, Niger and Ethiopia, Malian musician, Modja follows the burgeoning Great Green Wall through Africa’s Sahel region — one of the most vulnerable places on earth (temperatures are rising 1.5 times faster than the global average) — laying bare the acute consequences of severe land degradation and accelerating climate change the Wall aims to counteract: increasing desertification, drought, resource scarcity, radicalization, conflict and migration.