{"id":55737,"date":"2025-12-15T13:47:03","date_gmt":"2025-12-15T13:47:03","guid":{"rendered":"https:\/\/matis.is\/new-matis-is\/?p=55737"},"modified":"2025-12-15T13:47:04","modified_gmt":"2025-12-15T13:47:04","slug":"shifting-units-shifting-views-how-product-mass-and-protein-content-influence-environmental-impact-of-icelandic-lamb","status":"publish","type":"post","link":"https:\/\/matis.is\/en\/greinar\/shifting-units-shifting-views-how-product-mass-and-protein-content-influence-environmental-impact-of-icelandic-lamb\/","title":{"rendered":"Shifting units, shifting views: how product mass and protein content influence environmental impact of Icelandic lamb"},"content":{"rendered":"

Purpose<\/h3>\n\n\n\n

Lamb meat is a crucial protein source in Icelanders\u2019 diets. Extensive grazing lands, locally grown hay feed, and traditional farming methods are often used as arguments for Icelandic lamb meat\u2019s environmental friendliness. However, no life cycle assessment (LCA) study exists to corroborate these arguments. This study conducts a national-level LCA to evaluate the environmental performance of lamb meat based on two functional units to identify key hotspot processes in its production.<\/p>\n\n\n\n

Method<\/h3>\n\n\n\n

This study conducts a cradle-to-farm gate LCA at the national level for two functional units: 1 kg of edible lamb meat (ELM) and 100 g of ELM protein produced in Iceland in 2019. The multifunctionality between wool and meat is handled using mass allocation.<\/p>\n\n\n\n

The environmental impacts were estimated using the ReCiPe 2016 v1.1 mid-point (H) impact assessment method, emphasizing selected environmental categories: global warming, fossil resource scarcity, land use, and terrestrial ecotoxicity. In addition, the study conducts a scenario-based variability analysis by taking minimum and maximum values of inventory data to estimate the possible range of environmental impacts. Lastly, an overall uncertainty analysis and a global sensitivity analysis of the key hotspot process shed light on the variability and sensitivity of the LCA results.<\/p>\n\n\n\n

Result and discussion<\/h3>\n\n\n\n

For the 18 ReCiPe impact categories, animal and feed (hay) production are the hotspot processes, followed by feed (grazing) as a hotspot for land use. The global warming impact for 1 kg of ELM ranges 41\u201353 kg CO2<\/sub> equivalent, and for 100 g of protein, 19\u201329 kg CO2<\/sub>equivalent. Fossil resource scarcity impact for 1 kg of ELM impact ranges 2.5\u20133.6 kg oil equivalent, and for 100 g protein, 1\u20132 kg oil equivalent. Terrestrial ecotoxicity impacts for 1 kg of ELM range 46\u201369 kg 1,4-DCB, and for 100 g protein, 21\u201337 kg 1,4-DCB. Lastly, land use impacts for 1 kg of ELM range 562\u20132448 m2<\/sup>a crop equivalent, and for 100 g protein, 261\u20131324 m2<\/sup>a crop equivalent.<\/p>\n\n\n\n

Conclusion<\/h3>\n\n\n\n

With its traditional farming practices, Icelandic lamb meat production is close to an extensive farming system, which is in line with its higher global warming impact per kg ELM. Additionally, due to low hay yield and high fertilization rate, the impact on other impact categories is still higher compared to an extensive system. This perspective shifts when analyzed per 100 g of protein, where it performs close to the global average.<\/p>","protected":false},"excerpt":{"rendered":"

Purpose Lamb meat is a crucial protein source in Icelanders\u2019 diets. Extensive grazing lands, locally grown hay feed, and traditional […]<\/p>\n","protected":false},"author":7,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_uag_custom_page_level_css":"","site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[2011],"tags":[],"class_list":["post-55737","post","type-post","status-publish","format-standard","hentry","category-greinar"],"acf":[],"yoast_head":"\nShifting units, shifting views: how product mass and protein content influence environmental impact of Icelandic lamb - Mat\u00eds<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/matis.is\/en\/greinar\/shifting-units-shifting-views-how-product-mass-and-protein-content-influence-environmental-impact-of-icelandic-lamb\/\" \/>\n<meta property=\"og:locale\" content=\"en_GB\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Shifting units, shifting views: how product mass and protein content influence environmental impact of Icelandic lamb - Mat\u00eds\" \/>\n<meta property=\"og:description\" content=\"Purpose Lamb meat is a crucial protein source in Icelanders\u2019 diets. 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