{"id":66692,"date":"2019-11-04T12:57:43","date_gmt":"2019-11-04T12:57:43","guid":{"rendered":"https:\/\/www.pbctoday.co.uk\/news\/?p=66692"},"modified":"2021-12-01T13:18:00","modified_gmt":"2021-12-01T13:18:00","slug":"embodied-carbon-difficult","status":"publish","type":"post","link":"https:\/\/www.pbctoday.co.uk\/news\/energy-news\/embodied-carbon-difficult\/66692\/","title":{"rendered":"Embodied carbon: How much longer can we say \u201ctoo difficult\u201d?"},"content":{"rendered":"<h2>Dan Doran, principal consultant at <a href=\"https:\/\/www.breeam.com\/\" target=\"_blank\" rel=\"noopener noreferrer\">BREEAM<\/a>, discusses embodied carbon in construction. He examines what action the industry should be taking now to avoid overshooting the \u2018carbon budget\u2019, and the role of lifecycle assessment in measuring and reducing embodied carbon<\/h2>\n<p>Buildings and infrastructure assets are key sources of carbon emissions that require a rapid and far-reaching transition to deliver lower emissions. This must come from the two major sources:<\/p>\n<ul>\n<li>Operational carbon (from heating, cooling and power during use).<\/li>\n<li>Embodied carbon (from the construction product supply chain including energy consumption, chemical reactions, transport and installation\/construction activities).<\/li>\n<\/ul>\n<p>Operational carbon is generally considered to be responsible for the biggest share of total emissions and has long been covered by regulations in most countries. As the construction industry improves performance through research, training and experience regulations become progressively tougher (although arguably not tough enough to avoid exceeding the carbon budget).<\/p>\n<p>This is helped by the relatively intuitive link between design choices and operational carbon performance: using more insulation, efficient building services and renewable energy generation will result in proportionally lower <a href=\"https:\/\/www.pbctoday.co.uk\/news\/energy-news\/carbon-storage-construction\/58952\/\" target=\"_blank\" rel=\"noopener noreferrer\">CO2 emissions<\/a> (notwithstanding the widely acknowledged performance gap between designed for emissions and real emissions).<\/p>\n<p>The link between design choices and embodied carbon performance is not so intuitive. Embodied carbon emissions occur in varying ways across a plethora of complex construction products supply chains. So, lifecycle assessment (LCA) calculations and a large quantity of LCA data are required. LCA is unavoidable but complex, hard to comprehend and often accused of being a \u2018black box\u2019. Although there are rules of thumb, the complexity means LCA results can be unexpected and unexplained.<\/p>\n<p>Achieving better performance requires all aspects of the design to be considered simultaneously. Ultimately, it is difficult to prove the accuracy of LCA \u2013 unlike operational carbon emissions there is no meter that can be read when the building is occupied.<strong>\u00a0<\/strong><\/p>\n<p>These factors likely explain why embodied carbon is only covered by regulations in a few countries and is not widely understood or considered by the construction industry. The few construction projects that do consider embodied emissions do so voluntarily or to fulfil the requirements of a sustainability standard (like BREEAM, CEEQUAL or the Home Quality Mark).<\/p>\n<p>However, standardisation of construction LCA is well underway and more user-friendly well supported LCA software for building designers has recently become available. Despite the challenges, LCA is the most established way to tackle the unavoidable problem of embodied carbon.<\/p>\n<p>Acting sooner rather than later greatly improves the chances of avoiding the carbon budget and 1.5\u00b0C rise being overshot. It is this focus on early action that is of great relevance to embodied carbon but is often overlooked.<\/p>\n<p>Although whole-life operational carbon emissions may outweigh whole-life embodied carbon emissions, the former occurs gradually over the whole life of the building. As most buildings designed now will have a design life that goes well beyond the 2030 and 2050 timeframes, a significant proportion of operational carbon emissions occur after these target dates (notwithstanding they will still contribute to further global warming).<\/p>\n<p>Furthermore, operational carbon can be reduced during the life of the building (eg by installing more efficient building services) and will reduce automatically as energy generation switches to renewables or nuclear. Therefore, with respect to total emissions generated up to these target dates, the balance between operational and embodied moves in favour of the latter.<\/p>\n<p>Additionally, embodied carbon emissions largely occur in the construction product supply chain just before the building is constructed \u2013 so are released and use up the carbon budget immediately. Unlike operational carbon, embodied carbon emissions can\u2019t be reduced later \u2013 they have already happened.<\/p>\n<p>Therefore, not taking \u201crapid and far-reaching\u201d action on embodied carbon now is undeniably kicking the can down the road.<\/p>\n<p>Sustainability standards for buildings and infrastructure assets typically include embodied carbon-related requirements (and often other embodied impacts like water, toxicity, ozone and resource use). In light of the need to tackle embodied carbon to stay within the carbon budget, and the recent availability of suitable tools, BREEAM has begun introducing increasingly challenging <a href=\"https:\/\/www.breeam.com\/news\/breeam-why-building-lca\/\" target=\"_blank\" rel=\"noopener noreferrer\">LCA requirements<\/a> in its standards.<\/p>\n<p>With the latest version of <a href=\"https:\/\/www.breeam.com\/NC2018\/#09_material\/mat01_nc_a.htm%3FTocPath%3D9.0%2520Materials%7C_____1\" target=\"_blank\" rel=\"noopener noreferrer\">BREEAM UK New Construction<\/a>,\u00a0carrying out robust LCA early in the building design process using specialised LCA software, comparing the <a href=\"https:\/\/www.breeam.com\/news\/building-lca-benchmarks-breeam-uk-new-construction-2018\/\" target=\"_blank\" rel=\"noopener noreferrer\">results with a benchmark<\/a> and appraising different design options to reduce impacts accounts for over half of the credits in the Materials category of the standard. In addition, the contribution the Materials category makes to the overall BREEAM result (its weighting has increased to 15% \u2013 the second highest weighted category \u2013 only 1% less than Energy, the operational carbon category.<\/p>\n<h3>Living within our means<\/h3>\n<p>The <a href=\"https:\/\/unfccc.int\/process-and-meetings\/the-paris-agreement\/the-paris-agreement\" target=\"_blank\" rel=\"noopener noreferrer\">2016 Paris Agreement<\/a> states that mankind should aim for a limit on global warming of 1.5\u00b0C to avoid the worst threats from climate change. A rise beyond 1.5\u00b0C will significantly increase the rate of climate change and make it even harder to adapt in time. The scientific consensus <a href=\"https:\/\/www.ipcc.ch\/sr15\/resources\/headline-statements\/\" target=\"_blank\" rel=\"noopener noreferrer\">reached by the IPCC<\/a> is that human activity to date has already caused 1.0\u00b0C of global warming and 1.5\u00b0C may be reached within 11 years if the current rate of increase continues. Most greenhouse gas emissions from human activity accumulate and persist in the atmosphere for hundreds or thousands of years, continuing to cause changes to the climate and sea levels to rise.<\/p>\n<p>The maximum cumulative total of anthropogenic greenhouse gases required to limit global warming to 1.5\u00b0C is called the \u201ccarbon budget\u201d. Exceeding the carbon budget will likely result in 1.5\u00b0C being exceeded. To avoid overshooting the carbon budget and 1.5\u00b0C, mankind should aim for an emissions reduction pathway of 45% by 2030 (from 2010 levels) and net-zero around 2050.<\/p>\n<p>The IPCC describes this enormous challenge as: \u201cA rapid and far-reaching transitions in energy, land, urban and infrastructure (including transport and buildings), and industrial systems. These systems transitions are unprecedented in terms of scale, but not necessarily in terms of speed and imply deep emissions reductions in all sectors, a wide portfolio of mitigation options and a significant upscaling of investments in those options.\u201d<\/p>\n<p>Inaction to reduce our emissions now will result in utilising the carbon budget quickly, which will require an extremely rapid rate of reduction in emissions at the end of the 2050 timeframe \u2013 a rate even less likely to be politically and economically deliverable. We cannot afford to kick the can down the road.<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-66693 size-medium alignright\" src=\"https:\/\/www.pbctoday.co.uk\/news\/wp-content\/uploads\/2019\/11\/Headshot-David-300x200.jpg\" alt=\"Embodied carbon, BREEAM,\" width=\"300\" height=\"200\" srcset=\"https:\/\/www.pbctoday.co.uk\/news\/wp-content\/uploads\/2019\/11\/Headshot-David-300x200.jpg 300w, https:\/\/www.pbctoday.co.uk\/news\/wp-content\/uploads\/2019\/11\/Headshot-David-768x513.jpg 768w, https:\/\/www.pbctoday.co.uk\/news\/wp-content\/uploads\/2019\/11\/Headshot-David-696x465.jpg 696w, https:\/\/www.pbctoday.co.uk\/news\/wp-content\/uploads\/2019\/11\/Headshot-David-629x420.jpg 629w, https:\/\/www.pbctoday.co.uk\/news\/wp-content\/uploads\/2019\/11\/Headshot-David-610x407.jpg 610w, https:\/\/www.pbctoday.co.uk\/news\/wp-content\/uploads\/2019\/11\/Headshot-David.jpg 1023w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/p>\n<p><strong>Dan Doran<\/strong><\/p>\n<p>Principal Consultant<\/p>\n<p><a href=\"https:\/\/www.breeam.com\/\" target=\"_blank\" rel=\"noopener noreferrer\">BREEAM<\/a><\/p>\n<p>Tel: +44 (0)1923 664462<\/p>\n<p><a href=\"mailto:breeam@bregroup.com\" target=\"_blank\" rel=\"noopener noreferrer\">breeam@bregroup.com<\/a><\/p>\n<p><a href=\"http:\/\/www.breeam.com\" target=\"_blank\" rel=\"noopener noreferrer\">www.breeam.com<\/a><\/p>\n<p>Twitter:\u00a0<a href=\"http:\/\/www.twitter.com\/BRE_BREEAM\">BRE_BREEAM<\/a><\/p>\n<div class=\"mk-custom-module-container\">\n<\/div>","protected":false},"excerpt":{"rendered":"<p>Dan Doran, principal consultant at BREEAM, discusses embodied carbon in construction. He examines what action the industry should be taking now to avoid overshooting the \u2018carbon budget\u2019, and the role of lifecycle assessment in measuring and reducing embodied carbon.<\/p>\n","protected":false},"author":20,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[307],"tags":[566,587,594,693,676,430,673,279,579,818,40577,701,280],"stakeholder_rel_tag":[],"contributor_rel_tag":[],"class_list":{"0":"post-66692","1":"post","2":"type-post","3":"status-publish","4":"format-standard","6":"category-energy-news","7":"tag-air-quality","8":"tag-breeam","9":"tag-building-design","10":"tag-climate-change","11":"tag-construction","12":"tag-energy-efficiency","13":"tag-energy","14":"tag-environment","15":"tag-infrastructure","16":"tag-life-cycle-costings","17":"tag-pbc-today-november-2019","18":"tag-supply-chain","19":"tag-transport"},"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v26.9 (Yoast SEO v26.9) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Embodied carbon: How much longer can we say \u201ctoo difficult\u201d?<\/title>\n<meta name=\"description\" content=\"Dan Doran, discusses embodied carbon in construction, he examines what action the industry should be taking now to avoid overshooting the \u2018carbon budget\u2019\" \/>\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.pbctoday.co.uk\/news\/energy-news\/embodied-carbon-difficult\/66692\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Embodied carbon: How much longer can we say \u201ctoo difficult\u201d?\" \/>\n<meta property=\"og:description\" content=\"Dan Doran, discusses embodied carbon in construction, he examines what action the industry should be taking now to avoid overshooting the \u2018carbon budget\u2019\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.pbctoday.co.uk\/news\/energy-news\/embodied-carbon-difficult\/66692\/\" \/>\n<meta property=\"og:site_name\" content=\"Planning, Building &amp; 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