Inefficient use of IT infrastructure causes higher energy consumption and higher amount of metered bill. In addition, high energy consumption by IT infrastructure causes substantial carbon dioxide emission and contributes to the greenhouse effect of environment. Many corporate IT departments and governments have taken Green Computing initiatives to reduce the environmental impact of their IT operations. As per the current trend, efforts have been made towards the key areas such as making the use of computers as much energy efficient as much it is possible and designing algorithms and systems for efficiency related to computer technologies. This book discusses the methodology of minimizing power consumption in cloud computing environment and provide a promising solution to cut down metered bill and lower Carbon emissions.