Abstract
In the third Session of the Conference of Parties to the United Nations Framework Convention on Climate Change meeting, it has been decided that Japan must reduce the greenhouse gas 6 per cent below the 1990 level during the commitment period 2008 to 2012. In this study, the present condition and the trend of CO2 emissions from housings of all prefectures have been estimated. As the life of Japanese buildings are shorter than Western countries, and a large quantity of greenhouse gas is discharged from the housing construction, LCCO2 has been used as an evaluation method. CO2 emissions from dwelling process were calculated by using the annual report on the family income and expenditure survey, and CO2 emissions from construction process were calculated by using the housing construction statistics. Also the increase of CO2 emission in the 1995 level (average from 1993 to 1995) compared with the 1990 level which is the standard year of protocol has been analyzed. It has been cleared that the increase of the LCCO2 has been enormouse, and there was a great difference between CO2 emissions from both dwelling processes and construction processes. Specially, CO2 emissions from dwelling processes are great in quantity, and it had relations with the climate. And, the primary factor of the increase was the consumption of the electricity used for lightings and electric appliances. In the whole country, less than half of CO2 emissions from construction processes are caused by wooden houses recently, and CO2 emissions from rebuild are getting more than from new buildings. Though the market of housings has been low and the CO2 emissions from construction processes is decreasing by that, LCCO2 has not been decreasing. Other basic informations to examine the measure to protecting the global climate have been prepared.
