6) Tunis (Tunisia)
Tunis is the capital and the largest city of Tunisia. It is a fairly clean city, relative to other cities in North Africa. The City Council is responsible for keeping the city clean.
5) Gaborone (Botswana)
Gaborone is the capital city and also the largest city of Botswana. It is one of the fastest growing cities in the world. Gaborone is managed by the Gaborone City Council, which has taken many steps to keep the city clean. The pace of growth of the city has posed many challenges to the authorities.