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- Finnveden, Göran, et al.
(författare)
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Policy Instruments towards a sustainable waste management
- 2016
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Ingår i: Solid waste management: Policy and planning for a sustainable society. - : Apple Academic Press. - 9781771883740 - 9780429091650 ; , s. 185-246, s. 185-246
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Bokkapitel (övrigt vetenskapligt/konstnärligt)
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| 3. |
- Ekvall, Tomas, 1963
(författare)
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Attributional and consequential life cycle assessment
- 2020
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Ingår i: Sustainability Assessment at the 21st century. - : IntechOpen. ; , s. 42-62
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Bokkapitel (övrigt vetenskapligt/konstnärligt)abstract
- An attributional life cycle assessment (ALCA) estimates what share of the global environmental burdens belongs to a product. A consequential LCA (CLCA) gives an estimate of how the global environmental burdens are affected by the production and use of the product. The distinction arose to resolve debates on what input data to use in an LCA and how to deal with allocation problems. An ALCA is based on average data, and allocation is performed by partitioning environmental burdens of a process between the life cycles served by this process. A CLCA ideally uses marginal data in many parts of the life cycle and avoids allocation through system expansion. This chapter aims to discuss and clarify the key concepts. It also discusses pros and cons of different methodological options, based on criteria derived from the starting point that environmental systems analysis should contribute to reducing the negative environmental impacts of humankind or at least reduce the impacts per functional unit: the method should be feasible and generate results that are accurate, comprehensible, inspiring, and robust. The CLCA is more accurate, but ALCA has other advantages. The decision to make an ALCA or a CLCA should ideally be taken by the LCA practitioner after discussions with the client and possibly with other stakeholders and colleagues.
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| 4. |
- Ekvall, Tomas, 1963, et al.
(författare)
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Modelling material recycling in life cycle assessment: how sensitive are results to the available methods?
- 2020
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Ingår i: Handbook of the Circular Economy. - : Edward Elgar Publishing. - 9781788972727 ; , s. 116-136
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Bokkapitel (övrigt vetenskapligt/konstnärligt)abstract
- In open-loop recycling, material is recycled from one product into another. Life cycle assessment quantifies the environmental impacts of a single product. This requires understanding to what extent the primary production, the recycling, and the waste management activities belong to or affect the two product systems involved: the product that provides the material for recycling or the product produced from recycled material. The challenge is to identify how much each of the products contribute to the environmental benefit of recycling, i.e., to the avoided primary production and waste management. We describe and review many of the available methods for modelling material recycling and conclude that results can be very sensitive to the method adopted. More research is required to decide what method is the most accurate. There is also a trade-off between feasibility and accurate representation of the consequences of recycling. This implies that different methods can be applicable depending on the importance of the material recycling.
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