Carbon storage and mitigation potential of structural wood and biochar-based concrete in global urban building scenarios
世界の都市建築シナリオにおける構造用木材およびバイオ炭ベースコンクリートの炭素貯留と緩和ポテンシャル (AI 翻訳)
Alessio Mastrucci, Dominik Maierhofer, Xiaoyang Zhong, Nicolas Alaux, Felix Creutzig, Florian Maczek, Merle Quade, Martin Röck, Di Sheng, Matthew Gidden, Bas van Ruijven
🤖 gxceed AI 要約
日本語
本研究は、2020年から2100年までの世界の都市建築ストックにおけるバイオベース建築材料（構造用木材、バイオ炭ベースコンクリート）の炭素貯留と正味の排出削減ポテンシャルを評価。代替率10%、30%、50%のシナリオに加え、床面積削減や循環経済戦略との組み合わせを検討。木材代替により2100年までに累積11.0-24.8 GtCO2eqの正味炭素貯留が見込まれ、バイオ炭は7.9-14.5 GtCO2eq。持続可能な戦略と組み合わせることで最大64%（木材）・41%（バイオ炭）の排出削減効果。ただし実現可能性には供給制約等の課題がある。
English
This study assesses biogenic carbon storage and net embodied GHG emissions in global urban building stocks from 2020-2100 under material substitution scenarios (structural wood and biochar-based concrete at 10%, 30%, 50%). It combines these with sufficiency and circular economy strategies. Results show wood substitution yields cumulative net carbon storage of 11.0-24.8 GtCO2eq by 2100, reducing net embodied emissions by 20-100 GtCO2eq (-8% to -40%). Biochar achieves 7.9-14.5 GtCO2eq storage and up to 8 GtCO2eq reduction (-4%). Combining strategies amplifies mitigation to 64% (wood) and 41% (biochar). Feasibility depends on substitution rates and supply.
Unofficial AI-generated summary based on the public title and abstract. Not an official translation.
📝 gxceed 編集解説 — Why this matters
日本のGX文脈において
本研究は、日本の建築分野における炭素隔離と排出削減に直接的な示唆を与える。特に、構造用木材の利用は日本政府が推進する木造建築促進政策と整合し、SSBJの情報開示においても建築物のライフサイクルGHG排出量算定に活用できる。また、バイオ炭コンクリートは新たな技術として注目される。
In the global GX context
This study provides critical evidence for the potential of bio-based materials in reducing embodied carbon in buildings, directly relevant to global climate disclosure frameworks (e.g., ISSB, CSRD, SEC) that require reporting of scope 3 emissions from construction. It also informs transition finance strategies targeting the built environment.
👥 読者別の含意
🔬研究者:Researchers can use these quantitative estimates of carbon storage and emission reductions from material substitution to benchmark and refine lifecycle assessment models.
🏢実務担当者:Construction firms and real estate developers can leverage the findings to evaluate the climate benefits of switching to wood and biochar-based concrete, supporting green building certifications and emission disclosure.
🏛政策担当者:Policymakers can use the scenario results to design building codes and incentives that promote bio-based materials and circular economy strategies in urban development.
📄 Abstract（原文）
Urbanization is accelerating globally, increasing material demand and associated greenhouse gas (GHG) emissions. Bio-based construction materials can store biogenic carbon within buildings over long periods, yet their net climate change mitigation potential, interaction with circular strategies, and feasibility remain uncertain. Here, we assess biogenic carbon storage and net embodied GHG emissions in global urban building stocks between 2020 and 2100 under material substitution scenarios including structural wood and biochar-based concrete at substitution levels of 10%, 30% and 50%. We further explore the mitigation potential of combining these substitution scenarios with sufficiency and circular economy strategies that reduce floor space demand and material flows. We account for biogenic carbon inflows and outflows, embodied emissions, and feasibility considerations. We find that substituting conventional construction systems with structural wood results in cumulative net carbon storage of 11.0-24.8 GtCO2eq by 2100. These scenarios reduce cumulative net embodied GHG emissions by 20-100 GtCO2eq (-8% to -40%) compared to current construction practices, due to both lower embodied emissions and higher net carbon storage associated. In contrast, substituting with biochar-based concrete achieves more limited cumulative net carbon storage of 7.9-14.5 GtCO2eq and reduces cumulative net embodied emissions by up to 8 GtCO2eq (-4%), constrained by feasible substitution rates in cement needed to maintain structural performance. Combining material substitutions with sufficiency and circular strategies delivers the greatest mitigation potential, lowering cumulative net embodied emissions by up to 64% for wood and 41% for biochar by 2100. Achieving the full carbon storage potential without complementary sufficiency and circular strategies would require substantial expansion of biochar supply, while the feasibility of wood-based storage depends strongly on the level of material substitution. These findings clarify the potential, limits, and feasibility of bio-based carbon storage in urban buildings worldwide.
🔗 Provenance — このレコードを発見したソース
- openalex https://doi.org/10.5281/zenodo.21370726first seen 2026-07-17 05:16:03
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