Abstract
Global food loss and waste (FLW) undermines the resilience and sustainability of food systems and is closely tied to the United Nation’s Sustainable Development Goals on climate, resource use and food security. Here we reveal strong yet under-discussed interconnections between FLW and two other Sustainable Development Goals of Human Health and Life on Land via the nitrogen cycle. We find that eliminating global FLW in 2015 would have reduced anthropogenic NH3 emissions associated with food production by 11.4 Tg (16%), decreased local PM2.5 concentrations by up to 5 μg m−3 and PM2.5-related years of life lost by 1.5 million years, and mitigated nitrogen critical load exceedances in global biodiversity hotspots by up to 19%. Halving FLW in 2030 will reduce years of life lost by 0.5–0.8 million years and nitrogen deposition by 4.7–6.0 Tg N per year (4%) (range for socioeconomic pathways). Complementary to near-term NH3 mitigation potential via technological measures, our study emphasizes incentivizing FLW reduction efforts from air quality and ecosystem health perspectives.
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Data availability
The datasets generated or analysed during this study are available in the Mendeley Data repository at https://data.mendeley.com/datasets/jjfg7h8bvd/1 (https://doi.org/10.17632/jjfg7h8bvd.1). The FAOSTAT dataset is publicly available at https://www.fao.org/faostat/en/#home. Source data are provided with this paper.
Code availability
The GEOS-Chem atmospheric chemistry model is available at https://geoschem.github.io/. The GAINS model is available at https://gains.iiasa.ac.at/models/gains_models4.html. The MATLAB codes generated for data analyses and visualization are also available in the Mendeley Data repository at https://data.mendeley.com/datasets/jjfg7h8bvd/1 (https://doi.org/10.17632/jjfg7h8bvd.1).
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Acknowledgements
This work is supported by the National Natural Science Foundation of China (41922037 and 71961137011), the PKU-IIASA (International Institute for Applied Systems Analysis) postdoctoral fellowship, International Fellowship for Postdoc Researchers (YJ20210002) and Special Support Fellowship (2022T150005) by China Postdoctoral Science Foundation, and High-performance Computing Platform of Peking University. This work was funded in part by the US Department of Energy (grant no. DE-SC0016361).
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Y.G., G.L. and L.Z. designed the study. Y.G., H.T. and M.Z. performed the research. L.Z., P.G.H., J.V., G.L., Xueying L., Xuejun L. and F.P. contributed data and analytical tools. Y.G., G.L. and L.Z. analysed the results and wrote the manuscript, with valuable suggestions contributed by all other co-authors.
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Guo, Y., Tan, H., Zhang, L. et al. Global food loss and waste embodies unrecognized harms to air quality and biodiversity hotspots. Nat Food 4, 686–698 (2023). https://doi.org/10.1038/s43016-023-00810-0
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DOI: https://doi.org/10.1038/s43016-023-00810-0
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