According to international experience, implementing conceptually novel management tools based on integrated approaches to the notion of sustainable development can increase the level of environmental safety of the national economy. The goal of the study is to generalize and systematize existing conceptual approaches to the definition of this notion in order to clarify the meaning and content of the phrase "green economy". The research was carried out using general scientific methods, including classifications to systematize theoretical approaches to the definition of "green economy", which are proposed by various scientific schools. Furthermore, structural and logical generalization to clarify the terminology, analysis and synthesis to summarize the existing conceptual approaches and green economy frameworks was conducted. The paper gives an insight into how the green economy develops, as well as the conditions necessary for its construction and the difficulties it faces. The various scientific definitions of the "green economy" are analysed and summarized. Based on findings, this paper gives recommendations for the "green" transformation.