Non-Federal Climate Leadership Can Sustain U.S. Emissions Reductions Under Federal Policy Uncertainty
連邦政策の不確実性下での非連邦気候リーダーシップによる米国排出削減の持続可能性 (AI 翻訳)
Alicia Zhao, Kiara Ordonez Olazabal, Claire V. Squire, Kowan O'Keefe, Matthew Binsted, Adriana Bryant, Stéphanie Vo, Dhruv Modi, Steven Smith, Ryna C, Nate Hultman
🤖 gxceed AI 要約
日本語
米国における連邦政策の後退下で、州レベルの野心的な気候政策が排出削減にどの程度寄与するかを統合評価モデルで分析。全州が高野心政策を採用し連邦政府が再関与すれば2035年までに2005年比56%削減可能。気候リーダー州のみでも45%削減。電力需要は24～34%増加し、新規電源の90%以上が再生可能エネルギー。
English
This study uses an integrated assessment model with state-level detail to assess U.S. GHG reductions under federal policy uncertainty. It finds that if all states adopt high-ambition policies and the federal government re-engages, a 56% reduction by 2035 is achievable; climate-leading states alone can deliver 45% under current federal policies. Electricity demand could rise 24–34% from 2021 levels, with over 90% of new capacity from renewables.
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
日本でも国主導のGX政策が進むが、本論文は州・自治体レベルの取組みが連邦政策の不確実性を補完できることを示す。日本の都道府県レベルでの気候施策強化や、国と地方の役割分担を考える上で示唆に富む。
In the global GX context
In a global context of fluctuating national commitments, this paper quantifies the power of subnational climate leadership, relevant for federal systems like the EU, Canada, and Australia. It provides evidence that state-level policies can sustain emissions reductions and drive renewable energy deployment even when national policy wavers.
👥 読者別の含意
🔬研究者:Provides a state-level integrated assessment model framework that can be adapted to other federal or decentralized contexts.
🏢実務担当者:Highlights specific policy actions (e.g., electrification, renewable mandates) that states can implement to meet near-term targets.
🏛政策担当者:Demonstrates that subnational action is crucial for bridging gaps in federal climate policy, offering a blueprint for state-level strategies.
📄 Abstract（原文）
Recent federal climate policy rollbacks in the United States have slowed progress toward high-ambition climate targets under the Paris Agreement. In the absence of federal climate leadership, there is a growing need to better understand the potential impacts of non-federal climate action. We assess the impacts of recent changes in federal policy, non-federal climate leadership, and potential federal re-engagement on U.S. greenhouse gas (GHG) emissions through 2035 using an integrated assessment model with state-level detail. We find that if all states adopt high-ambition policies and the next federal government re-orients on climate policy, a 56% reduction in GHG emissions can be delivered by 2035, relative to 2005 levels. A 45% reduction can be achieved with high-ambition actions from climate-leading states only, under existing federal policies. This compares to a 35% reduction under existing federal and subnational policies. Total electricity demand could increase by 24% to 34% from 2021 levels due to electrification policies and data center growth, with more than 90% of new capacity additions coming from renewables across scenarios. These findings highlight the potential impacts of non-federal leadership on near-term targets, and offer specific policy actions that can support electricity demand growth and domestic climate action.
🔗 Provenance — このレコードを発見したソース
- openalex https://doi.org/10.31223/x5z173first seen 2026-05-17 04:35:38
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