![In Africa, the Great Green Wall aimed at combating Sahel desertification and climate change is largely considered a failure.](https://www.worldpoliticsreview.com/wp-content/uploads/2023/02/sahel-desertification-great-green-wall-climate-change-africa-02232023-1.jpg?w=519&h=259&crop=1)
In 2007, the African Union launched the Great Green Wall project, an attempt to combat expanding desertification in the Sahel by planting a barrier of trees 10 miles wide across 4,500 miles by 2030. But the wall has so far produced disappointing results and shows the complexities of implementing a grand continent-wide scheme.