The world today is almost working on machines which are releasing hazardous gases & cloud is mainly working on the machine environment. Cloud Computing is the talk of the day and used by every person now a day. Almost all the domains are making using of this technology which on the back-end uses SAN (Storage Area Network) Technology. Through this service data, application & other resources can be accessed using internet. Cloud uses a large number of high-end machines which is resulting in the release of hazardous gases in the environment which has a negative impact on the environment around us. So, we need to look for aspects which can result in making cloud energy-efficient. In this paper, we have put forward some of the techniques which can be used to make cloud computing more energy-efficient.