Life Cycle Impacts and Benefits of Wood along the Value Chain: The Case of Switzerland

Summary Sustainable use of wood may contribute to coping with energy and material resource challenges. The goal of this study is to increase knowledge of the environmental effects of wood use by analyzing the complete value chain of all wooden goods produced or consumed in Switzerland. We start from a material flow analysis of current wood use in Switzerland. Environmental impacts related to the material flows are evaluated using life cycle assessment–based environmental indicators. Regarding climate change, we find an overall average benefit of 0.5 tonnes carbon dioxide equivalent per cubic meter of wood used. High environmental benefits are often achieved when replacing conventional heat production and energy-consuming materials in construction and furniture. The environmental performance of wood is, however, highly dependent on its use and environmental indicators. To exploit the mitigation potential of wood, we recommend to (1) apply its use where there are high substitution benefits like the replacement of fossil fuels for energy or energy-intensive building materials, (2) take appropriate measures to minimize negative effects like particulate matter emissions, and (3) keep a systems perspective to weigh effects like substitution and cascading against each other in a comprehensive manner. The results can provide guidance for further in-depth studies and prospective analyses of wood-use scenarios.

[1]  Leif Gustavsson,et al.  Energy and carbon balances of wood cascade chains , 2006 .

[2]  Gabriele Weber-Blaschke,et al.  LCA-based optimization of wood utilization under special consideration of a cascading use of wood. , 2015, Journal of environmental management.

[3]  M. Huijbregts,et al.  Global spatially explicit CO2 emission metrics for forest bioenergy , 2016, Scientific Reports.

[4]  Gabriele Weber-Blaschke,et al.  Potentials for cascading of recovered wood from building deconstruction—A case study for south-east Germany , 2013 .

[5]  Daniel Tschudi,et al.  Baseline effects on carbon footprints of biofuels: The case of wood , 2012 .

[6]  Pascal Lesage,et al.  Biogenic Carbon and Temporary Storage Addressed with Dynamic Life Cycle Assessment , 2013 .

[7]  Ambrose Dodoo,et al.  Recycling of Lumber , 2014 .

[8]  Adisa Azapagic,et al.  Is e-reading environmentally more sustainable than conventional reading? , 2014, Clean Technologies and Environmental Policy.

[9]  L. Gustavsson,et al.  Energy and CO2 analysis of wood substitution in construction , 2011 .

[10]  Frank Werner,et al.  National and global greenhouse gas dynamics of different forest management and wood use scenarios: a model-based assessment , 2010 .

[11]  Ernst Worrell,et al.  Handbook of recycling : state-of-the-art for practitioners, analysts, and scientists , 2014 .

[12]  R. Sathre,et al.  Meta-analysis of greenhouse gas displacement factors of wood product substitution , 2010 .

[13]  Aldo Roberto Ometto,et al.  Sustainable strategies analysis through Life Cycle Assessment: a case study in a furniture industry. , 2015 .

[14]  T. Palosuo,et al.  Assigning results of the Tool for Sustainability Impact Assessment (ToSIA) to products of a forest-wood-chain , 2010 .

[15]  Ted Sirkin,et al.  The cascade chain , 1994 .

[16]  Gregor Wernet,et al.  The ecoinvent database version 3 (part I): overview and methodology , 2016, The International Journal of Life Cycle Assessment.

[17]  Helmut Haberl,et al.  Cascade utilization of biomass: strategies for a more efficient use of a scarce resource , 2000 .

[18]  R. Frischknecht,et al.  Implementation of Life Cycle Impact Assessment Methods. ecoinvent report No. 3, v2.2 , 2010 .

[19]  S. Hellweg,et al.  Quantifying Land Use Impacts on Biodiversity: Combining Species-Area Models and Vulnerability Indicators. , 2015, Environmental science & technology.

[20]  S. Hellweg,et al.  Including indoor offgassed emissions in the life cycle inventories of wood products. , 2014, Environmental science & technology.

[21]  Francesco Cherubini,et al.  Application of probability distributions to the modeling of biogenic CO2 fluxes in life cycle assessment , 2012 .

[22]  S. Hellweg,et al.  Impact of Forest Management on Species Richness: Global Meta-Analysis and Economic Trade-Offs , 2016, Scientific Reports.

[23]  Aldo Roberto Ometto,et al.  Life cycle assessment of offset paper production in Brazil: hotspots and cleaner production alternatives , 2015 .

[24]  Gabriele Weber-Blaschke,et al.  Utilization of recovered wood in cascades versus utilization of primary wood—a comparison with life cycle assessment using system expansion , 2014, The International Journal of Life Cycle Assessment.

[25]  Ted Sirkin,et al.  The cascade chain: A theory and tool for achieving resource sustainability with applications for product design , 1994 .

[26]  Sara González-García,et al.  Environmental performance assessment of hardboard manufacture , 2009 .

[27]  Bernhard Steubing,et al.  Streamlining scenario analysis and optimization of key choices in value chains using a modular LCA approach , 2016, The International Journal of Life Cycle Assessment.

[28]  Sönke Szidat,et al.  Dominant impact of residential wood burning on particulate matter in Alpine valleys during winter , 2007 .

[29]  E. Hertwich,et al.  CO2 emissions from biomass combustion for bioenergy: atmospheric decay and contribution to global warming , 2011 .

[30]  國合會系統管理者.  Global Forest Resources Assessment , 2016 .

[31]  R. Sathre,et al.  Life cycle assessment (LCA) of wood-based building materials , 2014 .

[32]  Erkki Tomppo,et al.  A report to the food and agriculture organization of the united nations (FAO) in support of sampling study for National Forestry Resources Monitoring and Assessment (NAFORMA) in Tanzania , 2010 .

[33]  York Ostermeyer,et al.  Environmental Impact of Buildings--What Matters? , 2015, Environmental science & technology.