Higher food prices arising from restrictions on exports from Russia or Ukraine have been exacerbated by energy price rises, leading to higher costs for agricultural inputs such as fertilizer. Here, using a scenario modelling approach, we quantify the potential outcomes of increasing agricultural input costs and the curtailment of exports from Russia and Ukraine on human health and the environment. We show that, combined, agricultural inputs costs and food export restrictions could increase food costs by 60–100% in 2023 from 2021 levels, potentially leading to undernourishment of 61–107 million people in 2023 and annual additional deaths of 416,000 to 1.01 million people if the associated dietary patterns are maintained. Furthermore, reduced land use intensification arising from higher input costs would lead to agricultural land expansion and associated carbon and biodiversity loss. The impact of agricultural input costs on food prices is larger than that from curtailment of Russian and Ukrainian exports. Restoring food trade from Ukraine and Russia alone is therefore insufficient to avoid food insecurity problem from higher energy and fertilizer prices. We contend that the immediacy of the food export problems associated with the war diverted attention away from the principal causes of current global food insecurity.
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Input data sources from the Food and Agriculture Organization (FAO; https://www.fao.org/faostat), World Bank (https://databank.worldbank.org) and the IIASA SSP database (https://tntcat.iiasa.ac.at/SspDb) are publicly available. The crop and pasture yield potential data from LPJ-GUESS are available on request from the corresponding authors. Source data are provided with this paper.
The model code used is publicly available at https://git.ecdf.ed.ac.uk/lul/plumv2/tags/RussiaUkrainePaper. Full results files can be provided on request to the authors.
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P.A. and R.H. were supported by the UK’s Global Food Security Programme project Resilience of the UK food system to Global Shocks (RUGS, BB/N020707/1). R.H. was also funded by the Novo Nordisk Challenge Programme grant number NNF20OC0060118. A.A. and M.D.A.R. acknowledge support through the Helmholtz Association.
The authors declare no competing interests.
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Modelled results of time series of price percentage changes.
Modelled results of annual change of deaths.
Modelled results of time series of agricultural areas and intensities.
Modelled raster of agricultural areas and intensities.
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Alexander, P., Arneth, A., Henry, R. et al. High energy and fertilizer prices are more damaging than food export curtailment from Ukraine and Russia for food prices, health and the environment. Nat Food 4, 84–95 (2023). https://doi.org/10.1038/s43016-022-00659-9
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