Summary
This 2021 analysis published in Nature Food synthesised global data on lifecycle greenhouse gas emissions across food production systems, comparing animal-based and plant-based food commodities. The work suggests that, on a global basis, animal-derived products generate approximately twice the emissions of plant-derived alternatives, though the magnitude varies by production system, geography, and functional unit (mass versus energy). The findings contribute to evidence on the climate footprint of different dietary patterns and food supply chains.
UK applicability
The global synthesis is relevant to UK dietary and agricultural policy discussions, particularly around net-zero commitments and food system decarbonisation. However, UK-specific production intensities and emissions profiles may differ from global averages, especially for pasture-based systems, requiring localised assessment for policy application.
Key measures
Greenhouse gas emissions (likely CO₂-eq) per unit mass or caloric content; comparative ratios between animal-based and plant-based food categories
Outcomes reported
The study quantified and compared lifecycle greenhouse gas emissions across animal-based and plant-based food products globally. As suggested by the title, the research examined relative emission intensities of different food categories.
Topic tags
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