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- W2237445137 abstract "Life cycle assessments (LCAs) of crop production systems and food products commonly report results using functional units of mass. While these functional units appear to facilitate comparison between different products, they fail to account for substantial differences in a multitude of benefits humans derive from food products, especially nutritional value. This study explores the effects of using different functional units, including mass, serving size, energy content, protein content and a composite nutrient score, on four food’s life cycle global warming potential (GWP). Process-based LCA models of almonds, processed tomatoes (diced and paste), and rice, all produced in California, are used to calculate GWP. The results show that rice has the highest GWP except for the energy-content based functional unit, and almonds the lowest GWP except for the mass-based functional unit, and the performance of all the products are significantly affected by the choice of functional unit. The composite nutrient score functional unit appears to magnify the differences among the foods because it accentuates nutrient density, and thus foods like almonds perform better and foods like rice perform worse. Transparency in reporting and reporting multiple functional units is recommended for future studies." @default.
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- W2237445137 date "2014-01-01" @default.
- W2237445137 modified "2023-09-23" @default.
- W2237445137 title "Comparing alternative nutritional functional units for expressing life cycle greenhouse gas emissions in food production systems." @default.
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