Globally increase in the temperature causing various effect on earth and human lives and therefore has become more concern of the researchers. The supply chain activities, are also involves energy consumption releasing carbon di oxide gas which is more responsible affecting earth temperature. Introduction of technologies in supply chain system faster the release of carbon emission, mainly during production and stocking goods in warehouse. This paper focus on sustainable green supply chain model (SGSCM) preferring in reduction of carbon emission by learning effect on production as well as on holding cost together with consideration of price sensitive and stock level dependent demand rate of market which is realistic phenomenon of customers. The two-stage integrated sustainable green supply chain model (SGSCM) with vendor-buyer policy for single item has been developed with joint agreement of investing in learning process to reduce time of production and number of shipments together with carbon emission under centralised policy. Authors consider investing in learning in production and training labour affecting carbon emission and increasing overall profit of supply chain. Validity of model is carried by numerical illustration with comparison of centralised and decentralised policies.