Changes in the carbon footprint of Japanese households in an aging society.

As the aging and low birthrate trends continue in Japan, and as changes in the working population and consumption patterns occur, new factors are expected to have an impact on consumption-based greenhouse gas (GHG) emissions. We present the impacts of changes in the composition of Japanese households on GHG emission structures using current (2005) consumption-based accounting on the commodity sectors that are expected to require priority efforts for reducing emissions in 2035. This is done using the Global Link Input-Output model (GLIO) and domestic household consumption data and assuming that recent detailed consumption expenditures based on the Social Accounting Matrix (SAM) will continue into the future. The results show that consumption-based GHG emissions derived from Japanese household consumption in 2035 are estimated to be 1061 Mt-CO2eq (4.2% lower than in 2005). This study can be used to reveal more information and as a resource in developing policies to more meticulously and efficiently reduce emissions based on emission and import rates for each domestic and overseas commodity supply chain.

[1]  T. Ozawa.  The Case of Japan , 2021, The International Journal of Social Quality.

[2]  Rokuta Inaba,et al.  Estimates of Embodied Global Energy and Air-Emission Intensities of Japanese Products for Building a Japanese Input–Output Life Cycle Assessment Database with a Global System Boundary , 2012, Environmental science & technology.

[3]  E. Hertwich.  Life cycle approaches to sustainable consumption: a critical review. , 2005, Environmental science & technology.

[4]  S. Suh,et al.  The material footprint of nations , 2013, Proceedings of the National Academy of Sciences.

[5]  Manfred Lenzen,et al.  International trade undermines national emission reduction targets: New evidence from air pollution , 2014 .

[6]  Eunnyeong Heo,et al.  The direct and indirect household energy requirements in the Republic of Korea from 1980 to 2000—An input–output analysis , 2007 .

[7]  C. Weber,et al.  Growth in emission transfers via international trade from 1990 to 2008 , 2011, Proceedings of the National Academy of Sciences.

[8]  M. Lenzen,et al.  Shared producer and consumer responsibility — Theory and practice , 2007 .

[9]  Manfred Lenzen,et al.  Mapping the structure of the world economy. , 2012, Environmental science & technology.

[10]  Jesper Munksgaard,et al.  CO2 accounts for open economies: producer or consumer responsibility? , 2001 .

[11]  L. Greene.  EHPnet: United Nations Framework Convention on Climate Change , 2000, Environmental Health Perspectives.

[12]  Manfred Lenzen,et al.  International trade drives biodiversity threats in developing nations , 2012, Nature.

[13]  S. Alam,et al.  Framework Convention on Climate Change , 1993 .

[14]  Jesper Munksgaard,et al.  Impact of household consumption on CO2 emissions , 2000 .

[15]  M. Andreaus.  Time, Gender and Carbon: A Study of the Carbon Implications of British Adults' Use of Time , 2014 .

[16]  Kristen Averyt,et al.  Climate change 2007: Synthesis Report. Contribution of Working Group I, II and III to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change. Summary for Policymakers. , 2007 .

[17]  S. Pachauri,et al.  Direct and indirect energy requirements of households in India , 2002 .

[18]  Tim Jackson,et al.  Forecasting scenarios for UK household expenditure and associated GHG emissions: Outlook to 2030 , 2012 .

[19]  T. Wiedmann.  A review of recent multi-region input–output models used for consumption-based emission and resource accounting , 2009 .

[20]  Manfred Lenzen,et al.  Energy requirements of Sydney households , 2004 .

[21]  Angela Druckman,et al.  Carbon Footprint of UK households , 2010 .

[22]  Shigemi Kagawa,et al.  Characterization of economic requirements for a "carbon-debt-free country". , 2012, Environmental science & technology.

[23]  E. Hertwich.  THE LIFE CYCLE ENVIRONMENTAL IMPACTS OF CONSUMPTION , 2011 .

[24]  Manfred Lenzen,et al.  Examining the global environmental impact of regional consumption activities — Part 2: Review of input–output models for the assessment of environmental impacts embodied in trade , 2007 .

[25]  Manfred Lenzen,et al.  Consumption-based GHG emission accounting: a UK case study , 2013 .

[26]  Y. Xi,et al.  Comprehensive evaluation of household indirect energy consumption and impacts of alternative energy policies in China by input-output analysis , 2009 .

[27]  G. Peters.  From production-based to consumption-based national emission inventories , 2008 .

[28]  H. S. Matthews,et al.  Quantifying the global and distributional aspects of American household carbon footprint , 2008 .

[29]  Manfred Lenzen,et al.  International trade of scarce water , 2013 .

[30]  O. Edenhofer,et al.  Intergovernmental Panel on Climate Change (IPCC) , 2013 .

[31]  Giovanni Baiocchi,et al.  Understanding changes in the UK's CO2 emissions: a global perspective. , 2010, Environmental science & technology.

[32]  Shigemi Kagawa,et al.  IMPROVING THE COMPLETENESS OF PRODUCT CARBON FOOTPRINTS USING A GLOBAL LINK INPUT–OUTPUT MODEL: THE CASE OF JAPAN , 2009 .

[33]  Tobias Kronenberg,et al.  The impact of demographic change on energy use and greenhouse gas emissions in Germany , 2009 .

[34]  Kate Scott,et al.  Link between climate change mitigation and resource efficiency: A UK case study , 2012 .

[35]  E. Hertwich,et al.  Post-Kyoto greenhouse gas inventories: production versus consumption , 2008 .

[36]  S. Davis,et al.  Consumption-based accounting of CO2 emissions , 2010, Proceedings of the National Academy of Sciences.

[37]  E. Hertwich,et al.  Carbon footprint of nations: a global, trade-linked analysis. , 2009, Environmental science & technology.

[38]  Manfred Lenzen,et al.  CO2 Multipliers in Multi-region Input-Output Models , 2004 .

[39]  Ilmo Mäenpää,et al.  Greenhouse gases embodied in the international trade and final consumption of Finland: An input–output analysis , 2007 .