Reducing energy consumption in absolute terms or for the same amount of services provided has long been an important practice and policy focus in the industrialized countries since the oil crises in the 1970s, and is increasingly important in emerging economies, too. Along with fuel switch, energy conservation and efficiency improvement are also necessary approaches to climate change mitigation. For instance, the Kyoto Protocol to the United Nations Framework Convention on Climate Change provides that parties to the Protocol in achieving its quantified emission limitation and reduction commitments under article 3, in order to promote sustainable development, shall implement and/or further elaborate policies and measures in accordance with its national circumstances, such as enhancement of energy efficiency in relevant sectors of the national economy; research on, and promotion, development and increased use of, new and renewable forms of energy, of carbon dioxide sequestration technologies and of advanced and innovative environmentally sound technologies. The paper aimed at analyzing energy efficiency practices in Nigeria. The doctrinal research methodology was employed to achieve the aim of this paper. The finding of the paper revealed that the Nigeria the growth of renewable energy is bedeviled by many issues. This paper therefore recommended that government policies should be made to make it mandatory for public and private companies such as banks, hotels, industries to train their staff on energy management.