Abstract
In this study, a new analytical method with network analysis was proposed for capturing quantitatively the structure of Internet information network that consists of environmental information Web sites with the common theme, and applied to seven Web sites for Pollutant Release and Transfer Register (PRTR) in the world. As a result, it was revealed that the type of link between different layers within a PRTR site differs one site to another while basic network structure of the site is hierarchical; and certain degree of information network has already formed among the PRTR sites. The results showed the validity of the proposed method if only partially.
