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m v2.05b - Bot T20 CW#61 - Fix errors for CW project (Reference before punctuation)
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Often, the most significant scope for reduction of construction mass is found in structural design, where measures such as reduced beam or slab span (and an associated increase in column density) can yield large carbon savings.<ref>{{Cite web |author-link=Buro Happold |title=Embodied Carbon Sensitivity Study |url=https://www.istructe.org/IStructE/media/Public/Resources/case-study-embodied-carbon-routes-to-reduction-20200406.pdf}}</ref>
To assist material substitution (with low carbon alternatives), manufacturers of materials such as [[Rebar|steel re-bar]], [[Glued laminated timber|glulam]], and [[precast concrete]] typically provide [[Environmental product declaration|Environmental Product Declarations]] (EPD) which certify the carbon impact as well as general environmental impacts of their products.<ref>{{Cite web|date=2015-05-15|title=Embodied Energy and Carbon|url=https://www.ice.org.uk/knowledge-and-resources/briefing-sheet/embodied-energy-and-carbon|access-date=2021-08-12|website=Institution of Civil Engineers (ICE)|language=en}}</ref>
Minimizing the use of [[emission intensity|carbon-intensive]] materials may mean selecting lower carbon versions of glass and steel products, and products manufactured using low-emissions energy sources. Embodied carbon may be reduced in concrete construction through the use of [[Portland cement]] alternatives such as [[Ground granulated blast-furnace slag]], recycled aggregates and industry by-products. Carbon-neutral, [[carbon positive]], and carbon-storing materials include bio-based materials such as [[Lumber|timber]], [[bamboo]], [[Hemp|hemp fibre]] and [[hempcrete]], [[wool]], dense-pack [[cellulose insulation]], and [[Cork (material)|cork]].<ref>{{Cite web|last=Varriale|first=Fabrizio|date=2021-05-27|title=The other side of the coin: Understanding embodied carbon|url=https://www.rics.org/en-hk/wbef/megatrends/natural-environment/the-other-side-of-the-coin-understanding-embodiehttps://www.rics.org/en-hk/wbef/megatrends/natural-environment/the-other-side-of-the-coin-understanding-embodied-carbon/d-carbon/|url-status=|access-date=2021-08-12|website=RICS World Built Environment Forum}}</ref><ref>{{Cite web|last1=Knopps|first1=Abigail|last2=Jain|first2=Diksha|title=Carbon-Positive Materials: No Longer Far-Fetched, Increasingly Available – My amast|url=https://amast.com/elementor-32898/|url-status=|access-date=2021-08-12|website=AMAST|date=14 December 2020 |language=en-US}}</ref><ref>{{Cite web|last=Pak|first=Anthony|date=2020-11-01|title=Embodied Carbon: Key Considerations for Key Materials|url=https://www.canadianarchitect.com/embodied-carbon-key-considerations-for-key-materials/|url-status=|access-date=2021-08-12|website=Canadian Architect|language=en-US}}</ref>
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