An international action : why?
The urban explosion of the last decades has been particularly strong in Mediterranean countries, in Asia and even more in Sub-Saharan Africa. Therefore, the actions led by the urban planning agencies internationally are more oriented towards developing countries where urban challenges are crucial. Various elements weaken urban expansion and do not allow to implement an efficient and sustainable local management: unfinished decentralization, weak project management and technical teams and reduced budgets. That is why partnerships should be encouraged to disseminate ideas.