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Land use impact assessment of margarine

  • GLOBAL LAND USE IMPACTS ON BIODIVERSITY AND ECOSYSTEM SERVICES IN LCA
  • Published:
The International Journal of Life Cycle Assessment Aims and scope Submit manuscript

Abstract

Purpose

This paper presents a case study of margarine, demonstrating the application of new characterisation factors (CF) for land use and a number of land use change impacts relating to biodiversity and ecosystem services. The objectives of this study were to generate insights as to the ease of applying these new factors and to assess their value in describing a number of environmental impacts from land use and land use change relating to the margarine product system.

Methods

This case study is a partial descriptive life cycle assessment (LCA) of margarine. The functional unit of the study is 500 g of packaged margarine used as a spread in the UK and Germany. The life cycle stages included were: agricultural production, oil processing, margarine manufacture and transportation to regional European distribution centres. Essential for the application of the new CF was the identification and quantification of the inventory flows for land occupation (land use) and land transformation (land use change) flows. A variety of methods have been applied to determine the inventory flows for the agricultural and industrial stages in the life cycle. These flows were then assessed using the new CF and land use-related environmental impact categories recommended in this special issue.

Results and discussion

Land occupation was the major determinant for all the new impact categories with the exception of the water purification potential. Many of the impact categories followed a similar pattern and therefore, the inventory result for land occupation in this case study explains a large share of most of the impacts. Where land occupation alone is not a suitable proxy for environmental impacts (i.e. for freshwater regulation potential), differentiation at the level of biomes has proven relevant. In addition, the land use types distinguished so far were found to be useful in highlighting likely hotspots in the life cycle, although further differentiation of ‘agricultural land’ is suggested to account for the differences between annual and permanent crops.

Conclusions

The new land use impact assessment methods applied help to identify hotspots in the life cycle of margarines, with different proportions and sources of vegetable oils. The specific impacts of each vegetable oil are determined mainly by the yield (and thus land occupation), but also by the type of agriculture (annual vs. permanent crops) and the sourcing location (and thus the sensitivity of biomes and occurrence of land use change). More research is needed to understand the usefulness of the various impact categories. For land use types, further refinement is required to describe different agricultural systems consistently across impact categories (e.g. annual vs. permanent cropping). In addition, the conceptual basis for the CFs applied in this case study (i.e. use of a potential reference for occupation and transformation) has limitations for some types of decisions normally supported by LCA.

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Notes

  1. A cut-off criterion was applied so that ingredients constituting less than 0.5% of the weight of the total ingredients were omitted.

  2. Proxy datasets were used for linseed and cassava as described in Nilsson et al. (2010).

  3. This is due to the fact that the CF for tropical forests was used for oil palm plantations.

  4. In addition, for CRP, an average value between pasture and forest was used, as this was considered a better fit for plantations.

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Acknowledgements

Vanessa King provided significant input in terms of sourcing countries and growing seasons for the different crops; Dr Henry King reviewed the manuscript and improved its clarity significantly. The authors also wish to thank all the colleagues from the LC Initiative project who provided continuous support and updates of the characterisation factors during the writing of this paper. Two anonymous reviewers have provided significant comments to the manuscript and the layout for Fig. 1; their input is gratefully acknowledged.

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Authors and Affiliations

  1. Safety and Environmental Assurance Centre, Unilever R&D, Colworth Science Park, Sharnbrook, Bedfordshire, MK44 1LQ, UK

    Llorenç Milà i Canals, Giles Rigarlsford & Sarah Sim

Authors
  1. Llorenç Milà i Canals
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  2. Giles Rigarlsford
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  3. Sarah Sim
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Corresponding author

Correspondence to Llorenç Milà i Canals.

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Responsible editor: Thomas Koellner

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Milà i Canals, L., Rigarlsford, G. & Sim, S. Land use impact assessment of margarine. Int J Life Cycle Assess 18, 1265–1277 (2013). https://doi.org/10.1007/s11367-012-0380-4

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  • DOI: https://doi.org/10.1007/s11367-012-0380-4

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