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Wireless Sensor Networks (WSNs) are used for continuously monitoring some physical phenomenon like temperature, humidity etc over a large geographical area. But the limited power supply is the major constraint of the Wireless Sensor Network because it uses non-rechargeable batteries in sensor nodes when it is being used in the areas where human approach is nearly impossible. A lot of researches are going on all over the world to reduce the energy consumption in sensor nodes. Data reduction scheme of energy conservation can be used to reduce the power consumption in WSNs. In this paper, data reduction scheme has been implemented using the prediction based approach. GM(1,1) model is used as the prediction model which is being used worldwide in most of the applications for predicting future values of time series data using some past values due to its high computational efficiency and accuracy …