We certainly need cloud computing. By the year of 2020, 15 percent of total global emissions will originated from information and communication technology (ICT) solutions. Fortunately, as the cloud computing will become mainstream in 5 years time, we can expect more businesses and personal users to go cloud; 71 percent of IT experts predict that Internet users will live in the cloud by 2020. That will bring even more benefits to the environment.
For better explaining the impact of cloud computing to the environment, here is cloud infographic.
Green Computing Technology 