Mansa was a royal title for leaders of the Malian Empire. It means something like "King" or "Super-King" or "Kingiest King."
Mansa Musa was one of the most important Mansas. He lived from the late 1200s to the early 1300s, and reigned over the Malian Empire at the peak of its power.
According to the internet it took centuries
Hope this helps :D
Continued air pollution with some cities threatened with submerging of land with water
