Simplified tools for global warming potential evaluation: when ‘good enough’ is best
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Background, aim and scope
In spite of a number of lingering issues, life cycle assessment (LCA) is widely recognised as one of the most powerful tools to investigate the environmental performance of a product or service. Carbon footprint (CF) analysis can also be considered a subset of LCA, limited to a single impact category (i.e. global warming potential (GWP)). However, the inherent complexity of a full LCA or CF analysis often stands in the way of their widespread application in the industry and policy-making sectors. For these latter ambits, this paper advocates the adoption of tailor-made streamlined approaches, with reduced inventory requirements and impact assessment scope. Two such examples are provided, respectively addressing the evaluation of GWP in the development of new product standards and the GWP savings attainable through the use of recycled materials.
Materials and methods
Both the application examples presented here are firmly rooted in life cycle thinking, and follow the guidelines provided by the current ISO standards on LCA. At the same time, the employed models are structured in such a way as not to require the deployment of specific LCA software but rely on simple algorithms instead, complemented by tables of data for the associated background processes sourced from standard life cycle inventory databases.
In the first example, the simplified algorithm was found to produce reliable and satisfactorily accurate results in terms of GWP, i.e. within 10% of those produced by a fully fledged LCA performed in parallel for validation purposes. In the second example, the adopted simplification only applied to the goal of the study (i.e. assessment of the absolute GWP savings, with no quantitative indication of their relative extent with respect to the total). Within these limits, the proposed simplified tool provided accurate indications, which enabled a clear ranking of the analysed products, in terms of desirability of recycling.
To the extent possible within the given set of constraints, simplified tools such as those presented here do not lose their scientific rigour and take into account all phases of the product life cycle. Their reduced goal and scope does of course limit the breadth of the information that they can produce, but this can be mitigated through a case-specific selection of the adopted inventory simplifications and impact category/ies.
The two application examples presented here have provided solid evidence that streamlined approaches such as these can go a long way in facilitating the introduction of life cycle thinking and LCA in the day-to-day practice of industries and policy makers, while still producing scientifically sound and robust results.
Recommendations and perspectives
Simplified LCA tools lend themselves to a wealth of possible applications in the industry and policy-making sectors. More case studies are in order, and it will be advisable not to limit the goal and scope of all streamlined approaches to carbon footprint evaluation but to pick the most relevant impact categories to be included in the model on a case-by-case basis.
- AENOR (1998) UNE 150041:1998 EX Simplified life cycle assessment.
- AENOR (2009) PNE 53942. Plásticos. Bolsas reutilizables de polietileno (PE) para el transporte de productos distribuidos al por menor. Requisitos particulares y métodos de ensayo.
- Ayres RU (1995) Life cycle analysis: a critique. Res Cons Rec 14:199–223 CrossRef
- BSI (2008) PAS 2050:2008—specification for the assessment of the life cycle greenhouse gas emissions of goods and services. Available via http://www.bsigroup.com/en/Standards-and-Publications/Industry-Sectors/Energy/PAS-2050/
- Carbon Trust (2007) Carbon footprinting—an introduction for organizations. Available at http://www.carbontrust.com/publications/CTV033.pdf
- Christiansen K (1997) Simplifying LCA: just a cut? Final report from the SETAC-EUROPE LCA Screening and Streamlining Working Group, Brussels
- Consoli F, Allen D, Boustead I, de Oude N, Fava J, Franklin R, Jensen AA, Parrish R, Perriman R, Postlethwaite D, Quay B, Séguin J, Vigon B (eds.) (1993) Guidelines for life-cycle assessment: a “code of practice”. Report of the workshop organised by SETAC in Portugal
- Curran MA, Young S (1996) Report from the EPA conference on streamlining LCA. Int J LCA 1:57–60 CrossRef
- EC (2003) Communication from the Commission to the Council and the European Parliament. Integrated product policy—building on environmental life-cycle thinking. COM/2003/0302 final
- Ecoinvent (2008) Swiss Centre for Life Cycle Inventories. Available at http://www.ecoinvent.ch
- Ekvall T, Assefa G, Björklund A, Eriksoon O, Finnveden G (2007) What life-cycle assessment does and does not to do in assessments of waste management. Waste Manag 27:989–996 CrossRef
- ELCD (2008) European Commission Joint Research Centre – European Reference Life Cycle Data System. http://lca.jrc.ec.europa.eu/lcainfohub/datasetArea.vm
- EPLCA (2009). Carbon footprint—what it is and how to measure it. European Commission Joint Research Centre. http://lct.jrc.ec.europa.eu/eplca
- Fleischer G, Gerner K, Kunst H, Lichtenvort K, Rebitzer G (2001) A semi-quantitative method for the impact assessment of emissions within a simplified life cycle assessment. Int J LCA 6(3):149–156 CrossRef
- Frischknecht R, Steiner R, Braunschweig A, Egli N, Hildesheimer G (2006) Swiss ecological scarcity method: the new version 2006. Available at http://www.esu-services.ch/cms/fileadmin/download/Frischknecht-2006-EcologicalScarcity-Paper.pdf
- Goedkoop M, Spriensma R (2001) The Eco-Indicator 99. A damage oriented method for life cycle assessment. Pré Consultants, Amersfoort, The Netherlands. http://www.pre.nl/download/EI99_methodology_v3.pdf
- Heijungs R, de Koning A, Ligthart T, Korenromp R (2004) Improvement of LCA characterization factors and LCA practice for metals. TNO-Report R 2004/347. http://media.leidenuniv.nl/legacy/final%20report%20metals.pdf
- Hochschorner E, Finnveden G (2003) Evaluation of two simplified life cycle assessment methods. Int J LCA 8(3):119–128 CrossRef
- Hur T, Lee J, Ryu F, Kwon E (2005) Simplified LCA and matrix methods in identifying the environmental aspects of a product system. J Environ Manag 75:229–237 CrossRef
- ISO (2006a) International Organization for Standardization, ISO 14040:2006 - Environmental Management. Life Cycle Assessment. Principles and Framework. http://www.iso.org/iso/home.htm
- ISO (2006b) International Organization for Standardization, ISO 14044:2006 - Environmental Management. Life Cycle Assessment. Requirements and Guidelines. http://www.iso.org/iso/home.htm
- Lindfors L-G, Christiansen K, Hoffmann L, Virtanen Y, Juntilla V, Hanssen OJ, Rønning A, Ekvall T, Finnveden G (1995) Nordic guidelines on life-cycle assessment. Nordic Council of Ministers, Nord 20. Copenhagen
- PE International (2007) GaBi professional database. http://documentation.gabi-software.com
- Potting J, Hauschild M (2005) Background for spatial differentiation in LCA impact assessment—the EDIP2003 methodology. Environmental project no. 996 2005, Danish Ministry of the Environment. Available at www2.mst.dk/Udgiv/publications/2005/87-7614-581-6/pdf/87-7614-582-4.pdf
- Raugei M, Ulgiati S (2009) A novel approach to the problem of geographic allocation of environmental impact in LCA, with special focus on the MFA method. J Ecol Indicators 9(6):1257–1264 CrossRef
- Schnoor JL (2009) LCA and environmental intelligence? EST 1(43):2997 CrossRef
- Sinden G (2009) The contribution of PAS 2050 to the evolution of international greenhouse gas emission standards. Int J LCA 14(3):195–203 CrossRef
- Steen BA (2006) Abiotic resource depletion—different perceptions of the problem with mineral deposits. Int J LCA 11(1):49–54 CrossRef
- Todd JA, Curran MA (1999) Streamlined life-cycle assessment: a final report from the SETAC North America streamlined LCA workgroup
- Ulgiati S, Raugei M, Bargigli S (2006) Overcoming the inadequacy of single-criterion approaches to life cycle assessment. Ecol Model 190(3–4):432–442 CrossRef
- Weidema BP, Wesnæs MS (1996) Data quality management for life cycle inventories—an example of using data quality indicators. J Clean Prod 4(3–4):167–174 CrossRef
- Simplified tools for global warming potential evaluation: when ‘good enough’ is best
The International Journal of Life Cycle Assessment
Volume 15, Issue 5 , pp 489-498
- Cover Date
- Print ISSN
- Online ISSN
- Additional Links
- Carbon footprint
- Global warming potential
- Green procurement
- Product standards
- Recycled materials
- Simplified tools
- Industry Sectors