Environmental impacts of Australian pork in 2020 and 2022 determined using lifecycle assessments

M. A. Copley; E. J. McGahan; K. McCormack; S. G. Wiedemann

doi:10.1071/AN23352

RESEARCH ARTICLE (Open Access)

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Environmental impacts of Australian pork in 2020 and 2022 determined using lifecycle assessments

M. A. Copley

^A ^* , E. J. McGahan ^A , K. McCormack ^B and S. G. Wiedemann

^A

+ Author Affiliations

- Author Affiliations

^A Integrity Ag, 10 Neil Street, Toowoomba City, Qld 4350, Australia.

^B Present address: Department of Primary Industries and Regional Development, 3 Baron-Hay Court, South Perth, WA 6151, Australia.

^* Correspondence to: maryfrances.copley@integrityag.net.au

Handling Editor: Frank Dunshea

Animal Production Science 64, AN23352 https://doi.org/10.1071/AN23352

Submitted: 17 October 2023 Accepted: 26 March 2024 Published: 13 May 2024

© 2024 The Author(s) (or their employer(s)). Published by CSIRO Publishing. This is an open access article distributed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND)

Abstract

Context

The Australian pork industry is highly efficient, with a history of ongoing productivity and environmental improvement. The introduction of economy-wide environmental targets require delivering and tracking performance improvement.

Aims

This study determined carbon footprint (greenhouse gas [GHG] and land use [LU] and direct land use change [dLUC] emissions, reported as kg CO₂-e), fossil energy (MJ), freshwater consumption (L), water stress (L H₂O-e), land occupation (m²) and eutrophication potential (nitrogen and phosphorus) for Australian pork for 2020 and 2022. Variability between housing, manure management systems, and regions were identified, and systems analysed to determine new options for low-impact pork.

Methods

In the largest Australian study of its kind, data for ~70% of pigs produced were collected using a stratified design. Using attributional life cycle assessment, impacts were reported per kilogram of liveweight (LW), post-processed, retail, and boneless, fat-corrected pork. Results are presented as industry averages ± 2 × s.d.

Key results

Key results were 3.0 ± 0.1 and 3.0 ± 0.1 kg CO₂-e GHG, 0.4 ± 0.07 and 0.3 ± 0.03 kg CO₂-e LU and dLUC, 12.9 ± 0.5 and 13.4 ± 0.5 MJ, 93.8 ± 9.6 and 52.5 ± 3.6 L, 68.4 ± 6.7 and 43.2 ± 3.3 L H₂O-e, and 12.0 ± 0.9 and 12.7 ± 0.9 m²/kg LW in 2020 and 2022, respectively. Due to industry growth, total emissions were higher in 2022. Eutrophication potential for Australian pork (2.2 × 10⁻⁴ ± 3.0 × 10⁻⁵ kg phosphorus and 8.7 × 10⁻³ ± 3.5 × 10⁻⁴ kg nitrogen/kg LW), reported for the first time, was low compared with grazing systems and European piggeries.

Conclusions

Industry has demonstrated long-term performance improvement, though the rate slowed between 2020 and 2022. Ongoing interventions are required to return to trend. Covered pond, deep litter, and outdoor systems produce lower carbon footprint pork and can provide other environmental benefits from renewable energy, and reduced fossil energy demand.

Implications

There is potential to further reduce environmental impacts through practice change. If industry is to meet formal targets, investment and proactive policy settings are required to overcome barriers to adoption of existing technology and support the techno-economic case for novel strategies.

Keywords: agricultural systems, carbon footprint, energy, eutrophication potential, greenhouse gases, land use change, life cycle assessment, pigs, pork, water stress.

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