Summary
This systematic analysis examines the environmental costs and benefits of agricultural intensification, synthesising evidence on whether higher-yielding systems reduce or increase net environmental burden when land-sparing effects are considered. The work highlights that environmental outcomes depend critically on the specific farming system employed, the metrics prioritised, and the counterfactual scenario against which comparisons are made. The findings suggest no universally optimal approach exists; rather, context-dependent trade-offs must be evaluated for particular regions and environmental priorities.
UK applicability
The findings are relevant to UK policy debates on agricultural intensification versus extensification, particularly for land-use planning and environmental regulation. UK farming systems—predominantly intensive arable and pastoral—operate in a constrained land-use context where land-sparing arguments carry particular weight, though trade-offs between greenhouse gas intensity and biodiversity remain contested.
Key measures
Environmental impact metrics including greenhouse gas emissions, nutrient runoff, water consumption, land use efficiency, and biodiversity outcomes; comparison across farming intensification levels and land-use scenarios
Outcomes reported
The study evaluated multiple environmental metrics (greenhouse gas emissions, nutrient pollution, water use, biodiversity impacts) across high-yield versus lower-intensity farming systems, accounting for land-sparing effects. It assessed whether intensification reduces overall environmental burden when compared across different baseline conditions and farming practices.
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