On top of these constraints, we have to add the fact that large numbers of managing waste staffs are not skilled
enough. Out of 20000 agents nationwide, they are only 4% who can be considered as skilled ones in towns and only
7 to 10% of in larger cities [2].
In practical terms these difficulties gave birth to thousands of uncontrolled landfills. Hence, major problems faced
by local authorities in order to keep their towns and cities clean.