摘要：Ecosystem including human beings owes its life activity to material cycle in earth system. With regard to industrial world,human beings extract materials from material cycle and change them into available material and energy by chemical reaction. As a result, they exhausted a lot of materials to the environment and thus recent environmental crisis occur. With regard to coastal area,which is strongly effected by human activities, it faces serious environmental problems such as red tide and green tide. To overcome these problems, it is very important to prompt material circulation between land and sea. In this paper, we propose exergy-based approach to evaluate sustainability of material cycle system. We verify proposed approach with a simple material cycle system. The results indicate that exergy can be a useful indicator for the evaluation of the sustainability of material cycle system.
