Sahel region, Africa (Google Maps ⧉, OpenStreetMap ⧉)

"Africa’s deserts are in retreat…Analysis of satellite images…reveals that dunes are retreating right across the Sahel region…Vegetation is ousting sand across a swathe of land stretching…6000 kilometers…. Analysts say the gradual greening has been happening since the mid 1980s, though has gone largely unnoticed."