The author analyzed the external motivations of the western green management completely,considered that the creation of the green management in western enterprises is a result of the interactions of many outside elements,such as the green tide,environment problems,the human environment consciousness,and the joint efforts of government,public,green organizations and international society.

One of the reasons is that people blur the difference between "to be" and "should be", between social subject and individual subject,and between internal education aim and external education aim in theory.

It is pointed out that the liquid bridge formed by extern water between two particles as well as particle and screen plate is the main factor which leadS to the deterioration of screening process.

Based on the summing up of the concepts of"ecological effect"at home and abroad,this paper pointed out that in researching ecological effects,both the extrinsic process and the intrinsic mechanism should be regarded.