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Study: Organic eggs worse for climate than caged chickens

scienceJul 29, 202630903

A Royal Society Open Science study led by Dr Harriet Bartlett at Oxford University’s Smith School estimates that switching all UK egg production to an organic free-range model would emit about 2,316,000 tonnes of CO2 equivalent, compared with 1,184,000 tCO2e for a fully caged system. The researchers found organic free-range systems require more hens to produce the same number of eggs because caged birds are more feed- and production-efficient, which is why organic systems produced roughly double the greenhouse gases per unit. Organic free-range production also scored worst for water eutrophication, acidification and land use, and the study reported higher hen mortality in organic free-range farms. The authors caution the analysis relies on farm data from 2009 to 2010, a limitation that may not reflect recent changes in egg production, and the study did not incorporate impacts such as pesticide toxicity or biodiversity. Lee Holdstock of Soil Association Certification said the research highlights important trade-offs but gives an incomplete picture of environmental impact because it omits soil health, nature and synthetic inputs. The paper frames a concrete policy dilemma: improving hen welfare through organic or free-range standards can raise measured climate and pollution burdens, forcing policymakers to weigh welfare outcomes against greenhouse gas and pollution targets.

George Monbiot
@georgemonbiot.bsky.social

It's a point I've been trying to make for a long time: there is no good way to meet even 10% of current demand for animal products. They trash the living world, whichever way you do it. If you want to reduce your impact, switch to a plant-based diet. www.theguardian.com/environment/...

6003h ago
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