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[B-14.2.4 Evaluation of Countermeasures against Global Warming in the Public Works Field]

[Contact Person]

Kaoru NIWA
Head
Environmental Planning Division, Environment Department,
Public Research Institute, Ministry of Construction
Asahi, Tsukuba, Ibaraki 305 Japan
Phone +81-298-64-2206, Fax +81-298-64-7221
E-mail niwa@pwri.go.jp

[Total Budget for FY1994-1996]

19,619,000 Yen (FY1996 6,432,000 Yen)

[Abstract]

　The first steps of this study were a survey of the relationship of the quantity of CO₂ emitted with the average rise in the global temperature and a survey of the cost of damage caused by global warming, followed by a study of the critical social costs of CO₂ emissions based on the results of the first two surveys accompanied by a study using the inter-industry relations table to find the quantity of CO₂ emitted for each product item used as building construction material. The next step was the use of the results of this research to perform comparisons of the quantity of CO₂ emitted using conventional construction methods with the quantity emitted using low CO₂ emitting construction methods for a number of structures including bridges and dams throughout the life cycle of these structures. This was followed by studies of differing structures with similar functions: comparisons of both the CO₂ emitted as they are constructed and that emitted as they are used. Based on the results, a macroscopic study was performed to determine to what extent it would be possible to reduce the total CO₂ emitted by all future construction projects. The results reveal that simply comparing costs including the calculated social costs accompanying the emission of CO₂, does not offer any incentive to reduce CO₂ emissions, and that from a macroscopic perspective, it will be necessary to introduce measures to provide additional incentives if emissions of CO₂ are to be reduced in the future.

[Key Words]

construction, social costs, CO₂ emissions, inter industry transactions