{"id":77110,"date":"2026-04-22T12:16:18","date_gmt":"2026-04-22T10:16:18","guid":{"rendered":"https:\/\/www.nooco.com\/?p=77110"},"modified":"2026-04-22T12:16:19","modified_gmt":"2026-04-22T10:16:19","slug":"carbon-footprint-monetary-ratios-or-lca","status":"publish","type":"post","link":"https:\/\/www.nooco.com\/en\/blog\/carbon-footprint-monetary-ratios-or-lca\/","title":{"rendered":"Carbon footprint: monetary ratios or LCA?"},"content":{"rendered":"\n<h1 class=\"wp-block-heading\"><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-impact-green-color\">Carbon footprint: monetary ratios or LCA?<\/mark><\/h1>\n\n\n\n<div style=\"height:50px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p>What is the significance of the gap between ADEME\u2019s monetary emission factors, often used in corporate carbon accounting, and LCA data used for carbon calculations in construction projects?<\/p>\n\n\n\n<p>Assessing the carbon footprint in the building sector has become a critical priority to meet increasing environmental requirements. In this context, professionals often rely on monetary emission factors provided by ADEME (the French Agency for Ecological Transition) to estimate their greenhouse gas (GHG) emissions.<\/p>\n\n\n\n<div style=\"height:50px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h4 class=\"wp-block-heading\"><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-impact-green-color\">Understanding data is essential to enable coherent and achievable transition plans.<\/mark><\/h4>\n\n\n\n<div style=\"height:50px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h5 class=\"wp-block-heading has-text-align-center\">Environmental impact of the products studied according to the two methods (kg CO\u2082 eq\/m\u00b2)<\/h5>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"75\" src=\"https:\/\/www.nooco.com\/web\/wp-content\/uploads\/2024\/09\/image-10-1024x75.png\" alt=\"\" class=\"wp-image-76508\" style=\"width:594px;height:43px\" srcset=\"https:\/\/www.nooco.com\/web\/wp-content\/uploads\/2024\/09\/image-10-1024x75.png 1024w, https:\/\/www.nooco.com\/web\/wp-content\/uploads\/2024\/09\/image-10-300x22.png 300w, https:\/\/www.nooco.com\/web\/wp-content\/uploads\/2024\/09\/image-10-768x56.png 768w, https:\/\/www.nooco.com\/web\/wp-content\/uploads\/2024\/09\/image-10-80x6.png 80w, https:\/\/www.nooco.com\/web\/wp-content\/uploads\/2024\/09\/image-10-260x19.png 260w, https:\/\/www.nooco.com\/web\/wp-content\/uploads\/2024\/09\/image-10.png 1180w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure><\/div>\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"1022\" height=\"844\" src=\"https:\/\/www.nooco.com\/web\/wp-content\/uploads\/2024\/09\/Screenshot-2024-09-19-at-15.27.56.png\" alt=\"Impact environnemental des produits \u00e9tudi\u00e9s selon les 2 m\u00e9thodes (kg \u00e9q. CO2\/m2)\" class=\"wp-image-76506\" style=\"aspect-ratio:1.2120658135283364;width:663px;height:auto\" srcset=\"https:\/\/www.nooco.com\/web\/wp-content\/uploads\/2024\/09\/Screenshot-2024-09-19-at-15.27.56.png 1022w, https:\/\/www.nooco.com\/web\/wp-content\/uploads\/2024\/09\/Screenshot-2024-09-19-at-15.27.56-300x248.png 300w, https:\/\/www.nooco.com\/web\/wp-content\/uploads\/2024\/09\/Screenshot-2024-09-19-at-15.27.56-768x634.png 768w, https:\/\/www.nooco.com\/web\/wp-content\/uploads\/2024\/09\/Screenshot-2024-09-19-at-15.27.56-80x66.png 80w, https:\/\/www.nooco.com\/web\/wp-content\/uploads\/2024\/09\/Screenshot-2024-09-19-at-15.27.56-194x160.png 194w\" sizes=\"auto, (max-width: 1022px) 100vw, 1022px\" \/><\/figure><\/div>\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"75\" src=\"https:\/\/www.nooco.com\/web\/wp-content\/uploads\/2024\/09\/image-10-1024x75.png\" alt=\"\" class=\"wp-image-76508\" style=\"width:594px;height:43px\" srcset=\"https:\/\/www.nooco.com\/web\/wp-content\/uploads\/2024\/09\/image-10-1024x75.png 1024w, https:\/\/www.nooco.com\/web\/wp-content\/uploads\/2024\/09\/image-10-300x22.png 300w, https:\/\/www.nooco.com\/web\/wp-content\/uploads\/2024\/09\/image-10-768x56.png 768w, https:\/\/www.nooco.com\/web\/wp-content\/uploads\/2024\/09\/image-10-80x6.png 80w, https:\/\/www.nooco.com\/web\/wp-content\/uploads\/2024\/09\/image-10-260x19.png 260w, https:\/\/www.nooco.com\/web\/wp-content\/uploads\/2024\/09\/image-10.png 1180w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure><\/div>\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"994\" height=\"844\" src=\"https:\/\/www.nooco.com\/web\/wp-content\/uploads\/2024\/09\/image-9.png\" alt=\"Impact environnemental des produits \u00e9tudi\u00e9s selon les 2 m\u00e9thodes (kg \u00e9q. CO2\/m2)\" class=\"wp-image-76504\" style=\"width:646px;height:548px\" srcset=\"https:\/\/www.nooco.com\/web\/wp-content\/uploads\/2024\/09\/image-9.png 994w, https:\/\/www.nooco.com\/web\/wp-content\/uploads\/2024\/09\/image-9-300x255.png 300w, https:\/\/www.nooco.com\/web\/wp-content\/uploads\/2024\/09\/image-9-768x652.png 768w, https:\/\/www.nooco.com\/web\/wp-content\/uploads\/2024\/09\/image-9-80x68.png 80w, https:\/\/www.nooco.com\/web\/wp-content\/uploads\/2024\/09\/image-9-188x160.png 188w\" sizes=\"auto, (max-width: 994px) 100vw, 994px\" \/><\/figure><\/div>\n\n\n<div style=\"height:50px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p>We compared above the carbon impact of several products obtained using two methods \u2014 monetary ratio (ADEME) and LCA (DED from the INIES database):<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Steel cable tray, 195 mm wide (1 m)<\/li>\n\n\n\n<li>Blinding concrete (1 m\u00b3)<\/li>\n\n\n\n<li>IRL conduit DN 17 &amp; 20 (1 m)<\/li>\n\n\n\n<li>AR2V mono 240 cable (1 m)<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"571\" src=\"https:\/\/www.nooco.com\/web\/wp-content\/uploads\/2024\/09\/image-7-1024x571.png\" alt=\"Impact carbone de plusieurs produits obtenu avec ces 2 m\u00e9thodes, ratio mon\u00e9taire\" class=\"wp-image-76492\" style=\"width:704px;height:392px\" srcset=\"https:\/\/www.nooco.com\/web\/wp-content\/uploads\/2024\/09\/image-7-1024x571.png 1024w, https:\/\/www.nooco.com\/web\/wp-content\/uploads\/2024\/09\/image-7-300x167.png 300w, https:\/\/www.nooco.com\/web\/wp-content\/uploads\/2024\/09\/image-7-768x428.png 768w, https:\/\/www.nooco.com\/web\/wp-content\/uploads\/2024\/09\/image-7-80x45.png 80w, https:\/\/www.nooco.com\/web\/wp-content\/uploads\/2024\/09\/image-7-260x145.png 260w, https:\/\/www.nooco.com\/web\/wp-content\/uploads\/2024\/09\/image-7.png 1396w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p><\/p>\n\n\n\n<p>The results based on monetary ratios tend to fall between default LCA values and certified low-carbon data.<\/p>\n\n\n\n<div style=\"height:50px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h4 class=\"wp-block-heading\"><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-impact-green-color\">Scope Difference<\/mark><\/h4>\n\n\n\n<p><\/p>\n\n\n\n<p>ADEME\u2019s monetary ratios provide average estimates of greenhouse gas emissions by sector or material. They are well-suited for high-level carbon footprints, typically used in corporate reporting or monitoring environmental commitments.<\/p>\n\n\n\n<p>In contrast, Life Cycle Assessment (LCA) offers a detailed analysis of a product\u2019s environmental impact across its entire life cycle, including the specific manufacturing technology, geographic context of the processes, and more\u2014making it a precise tool for evaluating individual projects.<\/p>\n\n\n\n<div style=\"height:50px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h4 class=\"wp-block-heading\"><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-impact-green-color\">Limitations<\/mark><\/h4>\n\n\n\n<p><\/p>\n\n\n\n<p>While less precise, the monetary ratio method allows for a quick translation of accounting data into carbon data. This approach is widely adopted by many companies but comes with several limitations:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Calculations are affected by inflation and purchase prices<\/li>\n\n\n\n<li>Emissions reduction strategies are limited to reducing revenue<\/li>\n\n\n\n<li>Low-carbon alternatives cannot be properly recognized<\/li>\n\n\n\n<li>Data is rarely updated<\/li>\n<\/ul>\n\n\n\n<p>LCA (Life Cycle Assessment) data, on the other hand, provides accurate calculations and enables the development of a concrete transition plan for the company. However, this approach is more complex to implement due to:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>The need for an annual extraction of purchases with structured and detailed data<\/li>\n\n\n\n<li>The difficulty in linking this data to specific environmental data<\/li>\n\n\n\n<li>The potential lack of data for certain products<\/li>\n<\/ul>\n\n\n\n<div style=\"height:0px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<div style=\"height:50px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h2 class=\"wp-block-heading\"><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-impact-green-color\">Conclusion<\/mark><\/h2>\n\n\n\n<p><\/p>\n\n\n\n<p>The ADEME monetary ratios are useful for quick carbon reporting and for providing an initial estimate of environmental impact. However, as discussed earlier, these ratios quickly show their limitations.<\/p>\n\n\n\n<p>Only physical methods\u2014though more complex to implement\u2014such as product-based Life Cycle Assessments (LCAs), allow for the proper recognition of low-carbon alternatives introduced as part of a carbon transition and reporting plan.<\/p>\n\n\n\n<p>A hybrid approach may be considered initially, combining the advantages of monetary ratios and physical methods, especially for products that lack available LCA data.<\/p>\n\n\n\n<div style=\"height:50px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h2 class=\"wp-block-heading\"><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-impact-green-color\">Sources<\/mark><\/h2>\n\n\n\n<p><\/p>\n\n\n\n<h4 class=\"wp-block-heading\">INIES<\/h4>\n\n\n\n<p>Cable tray &#8211; perforated\/solid (DED) :\u00a0 <a href=\"https:\/\/www.base-inies.fr\/iniesV4\/dist\/consultation.html?id=29373\">https:\/\/www.base-inies.fr\/iniesV4\/dist\/consultation.html?id=29373<\/a><\/p>\n\n\n\n<p>Cable tray &#8211; perforated\/solid (PEP) : <a href=\"https:\/\/www.base-inies.fr\/iniesV4\/dist\/consultation.html?id=38187\">https:\/\/www.base-inies.fr\/iniesV4\/dist\/consultation.html?id=38187<\/a><\/p>\n\n\n\n<p>Blinding concrete (DED) : <a href=\"https:\/\/www.base-inies.fr\/iniesV4\/dist\/consultation.html?id=31629\">https:\/\/www.base-inies.fr\/iniesV4\/dist\/consultation.html?id=31629<\/a><\/p>\n\n\n\n<p>Blinding concrete<strong> <\/strong>(FDES) : <a href=\"https:\/\/www.base-inies.fr\/iniesV4\/dist\/consultation.html?id=37701\">https:\/\/www.base-inies.fr\/iniesV4\/dist\/consultation.html?id=37701<\/a><\/p>\n\n\n\n<p>IRL tube (DED) : <a href=\"https:\/\/www.base-inies.fr\/iniesV4\/dist\/consultation.html?id=28942\">https:\/\/www.base-inies.fr\/iniesV4\/dist\/consultation.html?id=28942<\/a><\/p>\n\n\n\n<p>IRL tube (PEP)<strong> : <\/strong><a href=\"https:\/\/www.base-inies.fr\/iniesV4\/dist\/consultation.html?id=25975\">https:\/\/www.base-inies.fr\/iniesV4\/dist\/consultation.html?id=25975<\/a><\/p>\n\n\n\n<p>AR2V Aluminum cable (DED) : <a href=\"https:\/\/www.base-inies.fr\/iniesV4\/dist\/consultation.html?id=32675\">https:\/\/www.base-inies.fr\/iniesV4\/dist\/consultation.html?id=32675<\/a><\/p>\n\n\n\n<p><\/p>\n\n\n\n<h4 class=\"wp-block-heading\">PEPecopasseport<\/h4>\n\n\n\n<p class=\"has-t-black-color has-text-color\">AR2V Aluminum cable : <a href=\"https:\/\/register.pep-ecopassport.org\/pep\/consult\/mbesqrsCBZbWbKJq6-kJ3qUUeb8E8wHq0yU6oTQ-xTw\/mbesqrsCBZbWbKJq6-kJ3nXTEwaL2H-VUQApFU2-Q6g\">https:\/\/register.pep-ecopassport.org\/pep\/consult\/mbesqrsCBZbWbKJq6-kJ3qUUeb8E8wHq0yU6oTQ-xTw\/mbesqrsCBZbWbKJq6-kJ3nXTEwaL2H-VUQApFU2-Q6g<\/a><\/p>\n\n\n\n<p><\/p>\n\n\n\n<h4 class=\"wp-block-heading\">ADEME<\/h4>\n\n\n\n<p>Monetary ratio : <a href=\"https:\/\/base-empreinte.ademe.fr\/donnees\/jeu-donnees\">https:\/\/base-empreinte.ademe.fr\/donnees\/jeu-donnees<\/a><\/p>\n\n\n\n<p><\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Prices<\/h4>\n\n\n\n<p>Prices correspond to average observed market retail prices..<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Carbon footprint: monetary ratios or LCA? What is the significance of the gap between ADEME\u2019s monetary emission factors, often used in corporate carbon accounting, and LCA data used for carbon calculations in construction projects? Assessing the carbon footprint in the building sector has become a critical priority to meet increasing environmental requirements. In this context, [&hellip;]<\/p>\n","protected":false},"author":7,"featured_media":76525,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-77110","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-non-classifiee"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.7 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Carbon footprint: monetary ratios or LCA? - Nooco<\/title>\n<meta name=\"description\" content=\"Discover the differences between ADEME&#039;s spend-based factors and LCA for assessing the carbon footprint of your construction projects\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.nooco.com\/en\/blog\/carbon-footprint-monetary-ratios-or-lca\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Carbon footprint: monetary ratios or LCA? 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