Collaboration, data and tracking move Africa’s Great Green Wall toward its goal

Collaboration, data and tracking move Africa’s Great Green Wall toward its goal

The Great Green Wall in the Sahel, a mosaic of forests, farmlands and grasslands dotting the arid fringes of Sahara, was launched by the African Union in 2007 to fight desertification and land degradation. Stretching from Dakar in the west to Djibouti in the east, the 8,000-kilometer (5,000-mile) “wall” aims to restore 100 million hectares (247 million acres) of degraded land, create 10 million jobs, and sequester 250 million metric tons of carb…