Progress of emergy research on tourism systems Review of emergy theory applied in agro-ecological economic system in China Effects of reclamation of coal mining subsidence on emergy characteristics of agricultural ecosystem Research methods and outlook in the study of urban building metabolism A comparative study of fuzhou and Xiamen urban ecosystem based on emergy analysis H. T. Odum and Emerg Research in China Evaluation of Sustainability Based on Emergy Analysis in Ecological Economic System of Grassland Industry Discussion to the emergy evaluation analysis method