●　An Outline of the 2005 Annual Paper regarding a Sound Material−Cycle Society 　　 −Promoting 3Rs Towards the Establishment of a Sound Material −Cycle Society− 　　 Kazuyuki SHIMAMURA				12
●　Environmental Management in the Construction Field 　　 Matsunori NARA				17
●　Environmental Conservation by MLIT−Promotiong Green Purchasing− 　　 Noriyuki NOZAKI				21
●　Environmental Measures in a Metroporitan Expressway 　　 Naoaki TANIOKA				24
●　Measures to Protect the Trackside Environment 　　 Tatsuo MAEDA				29
●　Environmental Impact Assessment of Concrete 　　 Kenji KAWAI				34
●　Reused Bridge-Structures 　　 Yasuo KAJIKAWA				40
●　Reuse and Recycle of Building Structure 　　 Tsuyoshi SEIKE				50
●　Environmental Problems in the Construction of Prestressed Concrete Structures 　　 Mitsuaki IZUMI				57
●　The Action for the Environmental Preservation in 3 Main Construction Contractors 　　 Organizations in Japan 　　 Katsumi SAITO				63
●　Activities of Japanese Cement Industries on Environmental Issues 　　 Masafumi NAKAO				69
●　Ongoing Commitment of the Steel Industry Against Global Warming 　　 Takeshi TANAKA				73
●　Reseach and Study Comparative Foreign Technology in Prestressed Concrete Bridge (Part 2) 　　 Reseach and Study Committee of Comparative Foreign Technology in Prestressed 　　 Concrete Bridge				77
●　In - service Inspection of the PC Bridges with Corrugated Steel Webs (2) 　　 Society for Research on Composite Structures with Corrugated Steel Webs				84
●　Building Code Provisions for Precast / Prestressed Concrete : A Brief History 　　 Thomas J.D'Arcy, P.E., FPCI, George D.Nasser, P.E., S.K.Ghosh, ph.D., FPCI, 　　 Foreign Information Reseach Group				89