After the independence the city of Annaba has known a solid industrialization which is now the capital of Algerian industry and power of jobs. In fact, this has expressed an important rural migration. Obviously, in lapse time the population of Annaba city has relatively trebled and gone up from 200,000 to 600,000 inhabitants. This situation has meant in a rush for housing construction regardless of elementary rules of hygiene and cleaning up, degrading the frame of life citizen. The cleaning up problems has been taken over in the beginning of the eighty years with the construction of canal of security which has been allowed to convey the waste water from the west plain to the sea, passing by the Wadi Boudjemaa. Later, in the ninety years the lagoons has been installed to recycle the waste water of Annaba city.
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