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Currently computers are not only used in offices but also used at home. As the usage of computers are increasing day by day, the energy consumption is growing rapidly which in turns increase the carbon content in atmosphere. Mainly, IT industries are responsible for 3% of the world’s energy consumption with an increase of

20% per year. In this era green computing is a most emerging topic today. It is responsible for use of computers and related resources. It includes the implementation of energy-efficient CPU, Servers and Peripherals as well as reduced resource consumption and proper disposal of electronic waste. The main goal of Green computing is to increase the efficiency of the IT products during its lifecycle and endorse the recycling of useless goods and factory waste. This paper introduces some energy efficient techniques of green computing and their use in future.