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Water 2012, 4(3), 533-544; doi:10.3390/w4030533

Creation of Carbon Credits by Water Saving

ESG Promotion Department, TOTO LTD, 2-1-1, Nakashima, Kokurakita-ku, Kitakyushu-City 802-8601, Japan
CDM/JI Senior Consultant, Clean Energy Finance Committee, Mitsubishi UFJ Morgan Stanley Securities Co., Ltd, 3-3-20, Toyosu, Koto-ku, Tokyo 135-0061, Japan
Department of Architecture, School of Science and Techinology, Meiji University, 1-1-1, Higashimita, Tama-ku, Kawasaki-City 214-8601, Japan
Author to whom correspondence should be addressed.
Received: 13 June 2012 / Revised: 27 June 2012 / Accepted: 28 June 2012 / Published: 9 July 2012
(This article belongs to the Special Issue Sustainable Water Systems)
View Full-Text   |   Download PDF [628 KB, uploaded 9 June 2015]   |  


Until now, as a way of reducing greenhouse gas emissions from Japanese homes, the emphasis has been on reduction of energy consumption for air-conditioning and lighting. In recent years, there has been progress in CO2 emission reduction through research into the water-saving performance of bathroom fixtures such as toilets and showers. Simulations have shown that CO2 emissions associated with water consumption in Japanese homes can be reduced by 25% (1% of Japan’s total CO2 emissions) by 2020 through the adoption of the use of water-saving fixtures. In response to this finding, a program to promote the replacement of current fixtures with water-saving toilet bowls and thermally insulated bathtubs has been added to the Government of Japan’s energy-saving policy. Furthermore, CO2 emission reduction through widespread use of water-saving fixtures has been adopted by the domestic credit system promoted by the Government of Japan as a way of achieving CO2 emission-reduction targets; application of this credit system has also begun. As part of a bilateral offset credit mechanism promoted by the Government of Japan, research to evaluate the CO2 reduction potential of the adoption of water-saving fixtures has been done in the city of Dalian, in China. View Full-Text
Keywords: global warming; CO2 reduction; water; saving-water; Japan global warming; CO2 reduction; water; saving-water; Japan

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This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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Shimizu, Y.; Toyosada, K.; Yoshitaka, M.; Sakaue, K. Creation of Carbon Credits by Water Saving. Water 2012, 4, 533-544.

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