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Energy efficiency is the key concept of wireless communication to achieve green network. Green networking is the process that reduces consumption of energy as well for conserving bandwidth and also for any other process that will ultimately reduce energy use and, indirectly, the expense. With the rapid growth of technologies in wireless network and rapid increase of mobile users the problem of spectrum usage as well as energy consumption plays a vital role. As there is anexponential increase in the deployment of base station every year the power consumed by base station is the significant theme of intrigue. The increase in the number of base stations also leads to environment impact of CO 2 emission which is normally due to powering up the base station which is located in remote areas as these off-grid sites are powered by diesel generators. It is been predicted that if this trend continues then the energy consumed by cellular network in future will lead to a serious problem.Thus, there has to be a tradeoff between the quantity of subscribers and the quantity of base station or otherwise it will affect the system throughput. In this paper a brief review of methods that have been used recently to improve the energy consumed by the base station is analyzed.

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The temperature of earth intact is determined by the set of scales between incoming and outgoing energy. Climate changes happen largely from changes to the earth's heat equilibrium. Many factors that manipulated by natural processes and humanmade processes. The main factors influencing climate change are extraterrestrial factors, volcanism, earth's surface reflectivity and atmospheric factors. It is the impacts from anthropogenic processes, through the enhanced greenhouse effect, which are likely to be causing contemporary climate change. This in turn could bring about considerable environmental, social and economic disruption if adequate alleviation and variation measures are not implemented. The effectiveness of climate change due to green house effect can be reduced by reducing the surface reflectivity. For this an embedded earth reflection observer is designed. The system is inclusive of flimsy reflection observer, oriented rigidly to a predefined optimized observation angle. It observes the maximum level of transmitted heat from the earth and avoids the effectiveness of climate to shift from its natural state. The designed system maintains the environment temperature not greater than 32˚ centigrade with ±0.4% of error for a selected sample region during midday irrespective of the day conditions.