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The nitrogen footprint of food products and general consumption patterns in Austria

Listed author(s):
  • Pierer, Magdalena
  • Winiwarter, Wilfried
  • Leach, Allison M.
  • Galloway, James N.
Registered author(s):

    In this paper we use nitrogen (N) footprints as indicators of potential environmental impacts of food production in Austria. These footprints trace the losses of reactive nitrogen (Nr), i.e. N compounds that are generally accessible to biota, in connection to the chain of food production and consumption. While necessary for food production, Nr is known for its negative environmental impacts. The N footprints presented here describe Nr losses but do not link to effects directly. In deriving N footprints, Nr lost along the production chain needs to be quantified, expressed as “virtual nitrogen factors” (VNF). We calculated specific VNF for Austrian production conditions for a set of eight broad food categories (poultry, pork, beef, milk, vegetables & fruit, potatoes, legumes, cereals). The life-cycle oriented nitrogen footprints for the respective food groups were replenished by assessing Nr losses related to energy needs and to food consumption. The results demonstrate that in general, animal based products are less nitrogen-efficient than plant based products. For meat, footprints range from 64gN per kg (pork) to 134gN per kg (beef). For vegetable products, footprints are between 5gN per kg (potatoes) and 22gN per kg (legumes). The detailed ranking of food products is different when relating nitrogen footprints to either simple mass of food, or protein content. Vegetables & fruit cause only 9gN per kg, but 740gN per kg protein, which is even higher than pork (616gN per kg protein) or poultry (449gN per kg protein). These differences clearly show that taking into account protein and other aspects of food quality may be crucial for a proper assessment of dietary choices. The total N footprint per Austrian inhabitant is dominated by food production and consumption (85%) but also includes other activities linked to fixing nitrogen from the atmosphere (notably combustion). The average N footprint is 19.8kgN per year per Austrian inhabitant, which is on the lower end of a range of industrialized countries.

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    File URL: http://www.sciencedirect.com/science/article/pii/S0306919214001122
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    Article provided by Elsevier in its journal Food Policy.

    Volume (Year): 49 (2014)
    Issue (Month): P1 ()
    Pages: 128-136

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    Handle: RePEc:eee:jfpoli:v:49:y:2014:i:p1:p:128-136
    DOI: 10.1016/j.foodpol.2014.07.004
    Contact details of provider: Web page: http://www.elsevier.com/locate/foodpol

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    1. Wiedmann, Thomas & Minx, Jan & Barrett, John & Wackernagel, Mathis, 2006. "Allocating ecological footprints to final consumption categories with input-output analysis," Ecological Economics, Elsevier, vol. 56(1), pages 28-48, January.
    2. González, Alejandro D. & Frostell, Björn & Carlsson-Kanyama, Annika, 2011. "Protein efficiency per unit energy and per unit greenhouse gas emissions: Potential contribution of diet choices to climate change mitigation," Food Policy, Elsevier, vol. 36(5), pages 562-570, October.
    3. Stehfest, Elke & Berg, Maurits van den & Woltjer, Geert & Msangi, Siwa & Westhoek, Henk, 2013. "Options to reduce the environmental effects of livestock production – Comparison of two economic models," Agricultural Systems, Elsevier, vol. 114(C), pages 38-53.
    4. Nijdam, Durk & Rood, Trudy & Westhoek, Henk, 2012. "The price of protein: Review of land use and carbon footprints from life cycle assessments of animal food products and their substitutes," Food Policy, Elsevier, vol. 37(6), pages 760-770.
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