No. 6: Addis Ababa, Ethiopia
Public Domain Image: Public Domain
Health & sanitation index: 37.9
The Ethiopian capital faces one of the biggest pollution issues on the entire African continent. Addis Ababa’s insalubrities, and in particular the water pollution that leads to a high infant mortality rate and a high percentage of water-borne diseases, are largely caused by the complete lack of appropriate sanitation programs.