... sleep during idle time. KEYWORDS Sensor Networks, Routing Protocol, Data Aggregation, Air Pollution Monitoring, Data Fusion 1. INTRODUCTION Sensor networks are dense wireless networks of small, ... Aggregation Efficiency in Sensor Networks,” Ad Hoc Networks, Vol. 5 (8), pp. 1317-1328, November 2007. [19] O. Younis and S. Fahmy, "Distributed Clustering in Ad-hoc Sensor Networks: A Hybrid, ... Wireless sensor networks can be used to control the environment which involves monitoring air, soil and water. Sensors are deployed throughout the field and these sensors form a network that...