Green manufacturing and sustainability are the important issues for the manufacturing industries in the 21st century. In the industrial scenario, sustainability is a part of optimizing the product/process to achieve overall efficiency for the company in terms of economic, environmental and social aspects. The environmental concern is mainly concerned with safe working condition and energy saving and associated CO2 emission has become important for greener production. Thus, the need for energy efficiency in machining becomes a serious issue to the manufacturing industries. This study reviews the existing work to minimize the impact of machining processes on the environment.