Abstract
In this study, the Authors considered the deterioration prediction the information based on the frequency of environmental terminology in medium such as Grants-in-Aid for Scientific Research, newspaper, academic paper, Minutes, National Diet Library, and the White Paper. The selected environmental terminology, the Authors analyzed the frequency of 1984-2010. Degradation years of information were calculated from deterioration prediction formula and appearance frequency of environmental terminology. As a result, each environmental terminology, it was found that the information is degraded in from 6 years average. It was concluded that results showed the possibility to calculate the degradation of the information on environmental issues.
