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Wireless Sensor Networks (WSNs) is low cost, small sensor nodes and they can deployment these sensors wirelessly and easily. WSNs used for many applications such as environmental monitoring applications. WSN has limitations in energy, computation and storage. Limited power due they operate based on battery is a major challenge in WSNs. Many approaches are proposed in order to decrease energy dissipation and prolong lifetime of the network. An important issue in WSNs is use appropriate routing protocol algorithm. Routing protocols can be classified in many classes based on structure of the network such as flat routing protocols, hierarchical routing protocols and location routing protocols. In this paper, we focused on hierarchical-based routing protocols that are working depending on clustering algorithms. Clustering techniques are best methods for energy saving. The most common routing based …