Embodied TransboundaryGreenhouse Gas Emissions andMitigation Opportunities of over 700 Belt and Road Initiative Projects
700以上の一帯一路プロジェクトにおける国境を越えた温室効果ガス排出の内包と削減機会 (AI 翻訳)
Lingli Hou, Tomer Fishman (2560570), Stefano Merciai, Takuma Watari, Yanan Liang (4897240), Ester van der Voet, Asaf Tzachor, Heming Wang (631496), Peng Wang (34436), Jun Bi (120658), Ranran Wang (476935)
🤖 gxceed AI 要約
日本語
本研究は、105か国にわたる700以上の一帯一路（BRI）プロジェクトの建設段階における温室効果ガス（GHG）排出量を初めてプロジェクトレベルで評価した。物理的なグローバルサプライチェーンモデルを用いた分析により、総排出量134百万トンCO2相当の約半数がプロジェクト実施国以外で発生していることが判明した。再生可能エネルギープロジェクトは、建設時の排出を2年以内に相殺できる可能性がある。これは、国境を越えたインフラ事業における低炭素資材調達の重要性を示している。
English
This study presents the first global project-level assessment of GHG emissions from the construction of over 700 Belt and Road Initiative (BRI) projects across 105 countries. Using a physically grounded global supply chain model, it estimates 134 Mt CO2e, with about half occurring outside host countries. It finds that renewable energy projects can offset construction-phase emissions within two years, highlighting the need for cleaner material sourcing in transnational infrastructure.
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
本論文は、BRIプロジェクトの建設段階におけるGHG排出量をプロジェクトレベルで定量化し、その約半分が建設地国外で発生することを明らかにした。日本のGX政策では、サプライチェーンを通じた排出削減（Scope 3）や国際インフラ協力における脱炭素調達の重要性が高まっており、本研究成果は日本企業の海外展開やSSBJ対応にも示唆を与える。
In the global GX context
This paper provides the first project-level quantification of embodied emissions in BRI construction, revealing significant cross-border supply chain emissions. It aligns with global Scope 3 accounting and the need for transparent infrastructure carbon footprints under TCFD/ISSB frameworks. The finding that renewable projects can recoup emissions within two years offers a strong rationale for clean energy infrastructure investment.
👥 読者別の含意
🔬研究者:Provides a novel methodology for project-level embodied emission accounting in transnational infrastructure, useful for supply chain and carbon accounting researchers.
🏢実務担当者:Companies involved in BRI projects can use these findings to prioritize cleaner material sourcing and assess the carbon payback of renewable energy investments.
🏛政策担当者:Highlights the need to integrate sustainability criteria into BRI and other global infrastructure initiatives, and to require lifecycle emissions reporting.
📄 Abstract（原文）
The Belt and Road Initiative (BRI), the world’s largest ongoing infrastructure endeavor, tackles urgent development needs in underserved regions. However, its construction phase, especially material extraction and processing, may have far-reaching climate implications that remain poorly known. Here, we present the first global, project-level assessment of greenhouse gas (GHG) emissions embodied in the construction of over 700 individual BRI projects (2008–2024) across 105 countries. By integrating a detailed project data set with a physically grounded global supply chain model that captures material-specific sourcing patterns, we estimate 134 Mt of CO<sub>2</sub> equiv emissions, around half of which occur outside the project host countries. This reveals the previously unquantified global supply chain reach of the BRI. Depending on operational performance, BRI renewable energy projects may achieve emission reductions comparable in scale to the construction-phase emissions within 2 years. Our results underscore the need and opportunity to embed cleaner material sourcing and sustainability assessment into BRI and other transnational infrastructure efforts.
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