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Abstract
From home computers to enterprise systems, client to server machines, during recent years. It deals with reduction in carbon footprints and power saving. Energy is wasted in abundance at various data centres and data servers as well as in clouds. The research in the field of green computing is much wider. In the paper a detailed study has been done on various matters of green computing in all areas of society. Surveys have been analysed about green computing initiatives across the globe and interesting facts came out. Current trends, challenges and future trends in green computing are explored. Detailed research is required to find Green ICT so that users from different professions get benefits. In today’s scenario global warming is becoming a great threat, so with a view to that it is the need of the hour to make people aware about Green Computing.