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Does a life cycle assessment remain valid after 20 years? Scenario analysis with a bus stop study

dc.creatorAlbertí J.
dc.creatorCivancik-Uslu D.
dc.creatorContessotto D.
dc.creatorBalaguera A.
dc.creatorFullana-i-Palmer P.
dc.date2019
dc.date.accessioned2021-02-05T14:59:04Z
dc.date.available2021-02-05T14:59:04Z
dc.identifier.issn9213449
dc.identifier.urihttp://hdl.handle.net/11407/6066
dc.descriptionPurpose: The goal of this article is to find out if an old Life Cycle Assessment (LCA) study remains valid or not after a period of time. To answer this we re-perform an LCA of a bus stop in the city of Barcelona that was performed about 20 years ago. Methods: The LCA of a bus stop, performed and published in 1998, is re-performed and its results compared with those of the original study, keeping the same scope of the original system. The software used by the original study was SimaPro; the data came from IVAM LCA data, BUWAL 250, IDEMAT 96 and PRe4 databases; and CML 1992 impact assessment methodology was used. The new study used thinkstep GaBi6 software; GaBi6 Professional + extension databases; and CML 2001 methodology. The assessment includes an analysis of the key influencing factors that cause the discrepancies, such as models and databases. Moreover, a specific focus on evolution of the methodologies and its influence on the results is described. A 30% of difference between results is accepted as the threshold value to be able to state that the results differ. Results and discussion: The overall results obtained in the two studies are quite similar or, at least, comparable. However, when analysing and comparing the systems disaggregated stage by stage, higher differences in each impact category are found. Therefore, the lower discrepancy at system level may be due to coincidence or compensation. The main causes of discrepancy have been found to be: (i) the update of the assessment methodologies and characterization factors, (ii) the improvement of the databases, and (iii) the change in the techno-sphere and the improvement of the environmental policies. Conclusions and recommendations: After 15–20 years, LCA results cannot be considered reliable. Results can, however, be used as an indication for the expected order of magnitude of the impacts and for the relative importance of the processes in the different life cycle stages. The comparison is made through one case study only; therefore, it can barely be used as a generalization, neither for the difference in results nor for the sources of discrepancy. Nevertheless, this type of analysis can be considered a first step in quantifying the longevity of LCA results. © 2019 Elsevier B.V.
dc.language.isoeng
dc.publisherElsevier B.V.
dc.relation.isversionofhttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85060731063&doi=10.1016%2fj.resconrec.2019.01.041&partnerID=40&md5=5eb1e559183911382b36c1556069ffc1
dc.sourceResources, Conservation and Recycling
dc.titleDoes a life cycle assessment remain valid after 20 years? Scenario analysis with a bus stop study
dc.typeArticleeng
dc.rights.accessrightsinfo:eu-repo/semantics/restrictedAccess
dc.publisher.programIngeniería Ambientalspa
dc.identifier.doi10.1016/j.resconrec.2019.01.041
dc.relation.citationvolume144
dc.relation.citationstartpage169
dc.relation.citationendpage179
dc.publisher.facultyFacultad de Ingenieríasspa
dc.affiliationAlbertí, J., UNESCO Chair in Life Cycle and Climate Change ESCI-UPF, Universitat Pompeu Fabra, Passeig Pujades 1, Barcelona, 08003, Spain
dc.affiliationCivancik-Uslu, D., UNESCO Chair in Life Cycle and Climate Change ESCI-UPF, Universitat Pompeu Fabra, Passeig Pujades 1, Barcelona, 08003, Spain
dc.affiliationContessotto, D., UNESCO Chair in Life Cycle and Climate Change ESCI-UPF, Universitat Pompeu Fabra, Passeig Pujades 1, Barcelona, 08003, Spain, Department of Industrial Engineering, Università deglis studi di Padova, Via Gradenigo, 6/a, Padova, 35131, Italy
dc.affiliationBalaguera, A., UNESCO Chair in Life Cycle and Climate Change ESCI-UPF, Universitat Pompeu Fabra, Passeig Pujades 1, Barcelona, 08003, Spain, Facultad de Ingenierías, Universidad de Medellín, Carrera 87 N° 30 - 65, Medellín, Colombia
dc.affiliationFullana-i-Palmer, P., UNESCO Chair in Life Cycle and Climate Change ESCI-UPF, Universitat Pompeu Fabra, Passeig Pujades 1, Barcelona, 08003, Spain
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dc.type.versioninfo:eu-repo/semantics/publishedVersion
dc.type.driverinfo:eu-repo/semantics/article


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