LIFE CYCLE ASSESSMENT RESULTS
Environmental Impact Indicators Environmental impact indicators, namely global warming, acidification, eutrophication, smog creation and ozone depletion have been calculated using the North American impact assessment methodology TRACI v2.1 developed by the US EPA. The impact category indicators from TRACI are summarized in Table 2 . Total primary energy consumption has been determined using the Cumulative Energy Demand methodology 2 as a basis. The consumption of fresh water has been determined using the impact assessment methodology BEES+ v.4.03, more specifically its “water intake” indicator, as suggested in the PCR. A zero factor has been applied to “water, turbine use, unspecified natural origin”. Finally, material resource consumption and waste generation have been quantified from the inventory results. Table 2: Impact category indicators and reference substances of the TRACI methodology Impact category indicators Reference substance Description Global Warming kg CO 2 eq. Contribution to global warming for all the substances listed by the IPCC Acidification kg H + eq. Potential impact to increase acidity of soil and water systems Eutrophication kg N eq. Potential fertilization of a surface water where nutrient were previously scarce Smog kg O 3 eq. Potential impact on increasing smog Ozone kg CFC-11 eq. Potential impact on stratospheric ozone depletion
2 The method to calculate Cumulative Energy Demand (CED) is based on the method first published by ecoinvent version 1.01 and expanded by PRé Consultants for energy resources available in the SimaPro database. (Frischknecht et al. 2003).
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