Abstract
In 2005 the greenhouse gas emissions in Japan increased by 8.1% from 1990 levels. The achievement of the target required in the Kyoto Protocol is a difficult situation. As the CO2 absorption function of the forest is accepted to be counted in to the greenhouse gas reduction, the forest maintenance through afforestation, conservation, and deforestation is requested. The construction of the system that controls the discharge in the atmosphere is requested with CO2 stock for a long term by making wood building materials, and then the energy recovery. In this study the inventories of circulation technologies for wooden biomass was investigated. And the system is constructed that evaluates the effect of the carbon absorption, the carbon stock, and the fossil fuel reduction of the regional circulation. As a result of the case study for Saitama Prefecture, to maintain a current amount of the CO2 absorption, it was necessary to use local wood also for the usages other than construction. And the circulation use for a wooden biomass had the big potential in CO2 reduction.
