presents the identification of immaterial contributions
for the case study. As required by PAS 2050, the
anticipated life cycle GHG emissions are estimated separately
for the use phase. In order to simplify the presentation, the
anticipated results are shown for sections and not for single
processes, together with the data source used in each case.
The values of global warming potentials (GWP100) to transform
GHGs emission in kg of CO2e for GHGs are in accordance
with the latest ones available from the IPCC (IPCC, 2007).
SimaPro 7 was the software used for the computation of the
anticipated carbon footprint (Goedkoop et al., 2008). When
allocation is necessary, PAS 2050 specifies the use of (i)
subdivision of unit processes, (ii) system expansion, or (iii)
economic allocation, in order of preference. Additionally,
Table A1 in the Appendix (published as Supplementary
Material online only) gathers the main inventory data for
each of the sections, along with the individual contributions to
global warming.