Options for keeping the food system within environmental limits

Summary

This 2018 global modelling study by Springmann and colleagues, published in Nature, examines how food systems can be redesigned to provide adequate nutrition for projected population growth whilst remaining within critical environmental limits. The analysis demonstrates that single-intervention approaches—whether dietary change, waste reduction, or productivity gains alone—are insufficient; instead, combined strategies across both production and consumption are required. The work suggests that substantial reductions in ruminant meat consumption, particularly in high-income countries, coupled with improvements in agricultural efficiency and waste reduction, represent the most viable pathways to sustainability.

UK applicability

The findings are directly applicable to UK food policy and dietary guidance, as the United Kingdom is a high-income country where ruminant meat consumption is elevated and where both dietary and agricultural transformation are feasible. The modelling framework may inform UK climate commitments, the Eatwell Guide, and agricultural subsidy reform, though region-specific modelling accounting for UK soils, climate variability, and trade dependencies would strengthen local applicability.

Key measures

Greenhouse gas emissions, land use, freshwater use, nitrogen and phosphorus cycling constraints, nutritional adequacy by region and age group, food waste and losses

Outcomes reported

The study modelled multiple intervention scenarios across food production and consumption to identify which combined strategies could simultaneously meet global nutritional requirements and remain within planetary boundaries for climate, land use, freshwater, and nutrient cycling. The authors quantified the relative contribution of dietary shifts, waste reduction, and agricultural productivity improvements to achieving sustainability targets.

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