The Green Transition Paradox: A Life Cycle Assessment of the Hidden Environmental Burden in Energy-Intensive Biofuel Production Pathways
グリーン転換のパラドックス: エネルギー集約型バイオ燃料生産経路における隠れた環境負荷のライフサイクル評価 (AI 翻訳)
abdallah ibrahim Moharam, Mokhtar Behary, Ahmed Abdelaal
🤖 gxceed AI 要約
日本語
本研究は、高度バイオ燃料（3G・4G）の製造プロセスが持つ隠れた環境負荷（HEB）をライフサイクル評価（LCA）で検証。バイオガスが最も低い地球温暖化係数と毒性を示し、プロセス簡素性が持続可能性の鍵であると結論。政策に多基準評価の導入を提言。
English
This study uses life cycle assessment (LCA) to investigate the 'hidden environmental burden' in advanced biofuel pathways. It finds that biogas outperforms algal biodiesel and lignocellulosic bioethanol in global warming potential and toxicity, concluding that process simplicity determines sustainability and urging policy frameworks to adopt multi-criteria assessment.
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
日本ではバイオ燃料の導入が進むが、LCAに基づく評価は限定的。本論文の知見は、国内の廃棄物系バイオガス推進やエネルギー政策における隠れた環境負荷の考慮に貢献する。
In the global GX context
This paper contributes to the global energy transition debate by providing empirical evidence that advanced biofuel pathways may carry hidden environmental costs. It supports the need for comprehensive LCA in renewable energy policy, relevant to ISSB and TCFD frameworks that emphasize full value-chain impacts.
👥 読者別の含意
🔬研究者:LCA practitioners and bioenergy researchers gain a comparative assessment of biofuel pathways and the concept of hidden environmental burden.
🏢実務担当者:Biofuel producers can use the findings to prioritize low-intensity processes like biogas over energy-intensive alternatives.
🏛政策担当者:Energy and environment ministries should consider mandating multi-criteria LCA for renewable energy subsidies to avoid shifting environmental burdens.
📄 Abstract（原文）
The global energy transition requires a decisive shift from fossil fuels and first-generation (1G) biofuels toward advanced third- (3G) and fourth-generation (4G) pathways. However, the technological complexity needed to convert wastes into liquid fuels often demands intensive energy and chemical inputs that compromise intended environmental benefit. This study investigates the "Green Transition Paradox," hypothesizing that the processing intensity of advanced biofuels creates a "Hidden Environmental Burden" (HEB) that undermines their net sustainability. A comparative Life Cycle Assessment (LCA) was conducted under a strict Cradle-to-Gate boundary to evaluate the Net Environmental Burden (NEB) of three pathways: resource-efficient biogas, energy-intensive algal biodiesel, and energy-intensive lignocellulosic bioethanol. Key impact categories — Global Warming Potential (GWP), Fossil Depletion Potential (FDP), and Human Toxicity Potential (HTP) — were normalized to a functional unit of 1 MJ. Results showed that refinery gate-to-tank stages contribute up to 77% of environmental degradation in lignocellulosic pathways. Biogas consistently outperformed alternatives, with the lowest GWP score (0.01083 points) and a 76% reduction in fossil resource scarcity. Bioethanol exhibited high thermal intensity (52.5 MJ/L for distillation), while biogas recorded the lowest toxicity (35.017 kg 1,4-DB eq) compared with bioethanol (51.58 kg 1,4-DB eq). The study concludes that process simplicity is the primary determinant of sustainability, identifying waste-derived biogas as the superior pathway. Policy frameworks must prioritize FDP reduction and mandatory multi-criteria assessment to prevent harmful externalization of critical environmental burdens. These findings highlight the need to embed processing-stage impacts within renewable energy policy and ensure genuine rather than illusory environmental gains.
🔗 Provenance — このレコードを発見したソース
- openalex https://doi.org/10.21608/ajbas.2026.485688.1300first seen 2026-07-04 04:36:57
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