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Review article2018Peer reviewedOpen access

Defining a land boundary for sustainable livestock consumption

Van Zanten, Hannah H. E.; Herrero, Mario; Van Hal, Ollie; Roos, Elin; Muller, Adrian; Garnett, Tara; Gerber, Pierre J.; Schader, Christian; De Boer, Imke J. M.

Abstract

The need for more sustainable production and consumption of animal source food (ASF) is central to the achievement of the sustainable development goals: within this context, wise use of land is a core challenge and concern. A key question in feeding the future world is: how much ASF should we eat? We demonstrate that livestock raised under the circular economy concept could provide a significant, nonnegligible part (9-23g/per capita) of our daily protein needs (similar to 50-60g/per capita). This livestock then would not consume human-edible biomass, such as grains, but mainly convert leftovers from arable land and grass resources into valuable food, implying that production of livestock feed is largely decoupled from arable land. The availability of these biomass streams for livestock then determines the boundaries for livestock production and consumption. Under this concept, the competition for land for feed or food would be minimized and compared to no ASF, including some ASF in the human diet could free up about one quarter of global arable land. Our results also demonstrate that restricted growth in consumption of ASF in Africa and Asia would be feasible under these boundary conditions, while reductions in the rest of the world would be necessary to meet land use sustainability criteria. Managing this expansion and contraction of future consumption of ASF is essential for achieving sustainable nutrition security.

Keywords

animal source food; greenhouse gas emissions; land boundary; land use; leftovers; livestock; recycling biomass; sustainable consumption; sustainable development goals

Published in

Global Change Biology
2018, Volume: 24, number: 9, pages: 4185-4194
Publisher: WILEY

    Sustainable Development Goals

    SDG2 Zero hunger
    SDG12 Responsible consumption and production

    UKÄ Subject classification

    Food Science
    Environmental Sciences related to Agriculture and Land-use

    Publication identifier

    DOI: https://doi.org/10.1111/gcb.14321

    Permanent link to this page (URI)

    https://res.slu.se/id/publ/96516