Hamouche, Ouehchia2025-04-232025-04-2320242352– 9822http://dspace.univ-oeb.dz:4000/handle/123456789/22035This paper aims to present the green economy and to explain why and how this economy plays a role in both types of sustainability proposed by sustainable development. To achieve this, a qualitative method using literature review as a data collection tool was employed. The analyzed literature review highlighted that the first strides of the green economy in economic thought were taken by physiocrats, classics, neoclassicists and heterodoxes. The different perceptions of these economic schools regarding the environment gave rise to two (02) pioneering branches of the green economy, distinguished from each other by their goals and foundations. These branches take the form of the environmental economics based on weak sustainability and the ecological economics based on strong sustainability.enGreen economy; Weak sustainability; Environmental economics; Strong sustainability; Ecological economicsArticle