It is a common understanding in the civilized world that we should protect our environment from further damage, no matter upon what kind of political or ideological background this understanding is based or upon what kind of development level. 1 In the academic field, people are more interested in discussing HOW to protect our environment. We all generally agree that this is also a very important issue, because the methods and ways people take in environmental protection do not only re flect their perspectives in their understanding in protecting environment, but also provide us with an ef ficient and economical ways to do so. In order to achieve this academic object, the exchange of academic ideas and information and a comparative study is of great signi ficance. This article, therefore, is an attempt promote this kind of exchange and comparison.