Part I The concept and developmental tendency of Ecological Economics The subject quality of E.E A.The E.E owns the quality of frontier science. B.The E.E belongs to economics category,it is the new developmental stage of economics. C.The E.E belongs to generalized economics. D.The E.E belongs to synthetic economics.The subject quality of E.E A.The E.E owns the quality of frontier science. B. The E.E belongs to economics category, it is the new developmental stage of economics. C. The E.E belongs to generalized economics. D. The E.E belongs to synthetic economics. Part I The concept and developmental tendency of Ecological Economics