ثيطوم أيمنسعادة السعيد2018-02-012018-02-012017http://dspace.univ-msila.dz:8080//xmlui/handle/123456789/2091Due to the great importance that oil wealth playing the algerien economy; and as a resource axhausted by the hand, and constantly fluctuating prices in the world market on the other hand, unique, that algeria seek alternative fuel sector because it is crucial. Renewable energies sector is foreign investement and small and medium-sized enterprises, agriculture and tourism of the most important sectors that can bring economic development to the algerian national economy, that if a retional policy in order to optimize the use of these sectors, particularu since algeria has all the ingredients for succes in these options.otherالتنويع الإقتصادي, الثروة النفطية, السوق النفطية العالمية, الاستا رتيجياتThesis