IT energy management or Green IT as per International Federation of Global & Green ICT "IFGICT" is the analysis and management of energy demand within the Information Technology department in any organization. IT energy demand accounts for approximately 2% of global CO 2 emissions, approximately the same level as aviation,[1] and represents over 10% of all the global energy consumption (over 50% of aviation's energy consumption).[2] IT can account for 25% of a modern office building’s energy cost.[3]