the co2 emission factor of water in japan日本的二氧化碳排放因子的水.pdf

Water 2012, 4, 759-769; doi:10.3390/w4040759 OPEN ACCESS water ISSN 2073-4441 /journal/water Article The CO Emission Factor of Water in Japan 2 Yasutoshi Shimizu *, Satoshi Dejima and Kanako Toyosada ESG Promotion Department, TOTO LTD, 2-1- 1, Nakashima, Kokurakita-ku, Kitakyushu 802-8601, Japan; E-Mails: satoshi.dejima@ (S.D.); kanako.toyosada@ (K.T.) * Author to whom correspondence should be addressed; E-Mail: yasutoshi.shimizu@; Tel.: +81-93-952-3315; Fax: +81-93-952-3468. Received: 9 August 2012; in revised form: 23 September 2012 / Accepted: 24 September 2012 / Published: 28 September 2012 Abstract: From the viewpoint of combating global warming in Japan, measures to reduce emissions from the activities involved in daily life have been accelerated in concurrence with the efforts made in the industrial sector to save energy. As one such measure, the reduction of energy consumption in waterworks and sewer systems by reducing the volume of water used in the housing sector is gaining attention; measures for the conversion of water saving into CO2 reduction credit in the domestic credit system are also being examined. To address the credit development for CO2 reduction by water saving, it was necessary to determine the CO2 emission factor for water. Hence, we calculated the CO2