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2025 年 1 月の第 2 次トランプ政権発足以来、米大統領府は、'\リ協定脱退や石炭産業活性化に関する大統領令を相次いで発出し、米環境保護庁(EPA)は、温室効果ガスの影響に関する危険性認定を含む約 30 項目の環境規制の見直しを公表するなど、トランプ政権は、バイデン政権が進めてきた脱炭素政策からの全面的な見直しを目指しており、米国の環境、気候変動政策は大きく転換している。 また、トランプ政権は国連組織等の国際機関への拠出の一時停止や見直しを行うとともに、国務省、EPA、USAID をはじめとする連邦政府組織の見直し、大規模な人員削減を実施。USAID の機能停止により、世界各地での支援が停止するなど、世界中に影響が広がっている。 本業務では、こうした米国における環境...

Many cities have integrated health co-benefits into their climate plans to address cost concerns and build multi-stakeholder support for resilient, net-zero transitions. While some studies have demonstrated that cities vary in how much they link health and climate, few have examined why this is the case. This study fills this gap by using 16...

Decarbonizing transport systems is critical to a net-zero future. Explicitly factoring health co-benefits into urban climate/ transport plans could persuade decision-makers to adopt and implement the policies needed for such a future. Many studies have estimated the health benefits of transport policies with these ends in mind. However, how...

Main Messages This briefing note identifies factors which may reduce some of the negative impacts of the Trump Administration’s expected efforts to undermine climate policies as well as a few potential areas for positive bipartisan climate cooperation. Policies based on laws, such as the climate initiatives in the Inflation Reduction Act, will be...

This paper conducts a comparative analysis of green industrial policy strategies recently advanced by the European Union (EU) and the United States (U.S.), and extends insights to the evolving policy landscape in Japan. Its analysis underscores how the European strategy is characterized by a systematic approach that balances emissions constraints...

At the meeting of the Japan-US Sustainable Transitioin Network funded by the Center for Global Partnership, The Japan Foundation Grant Program: Japan-US Global Partnership, Hotta made a presentation on IGES research relevant to sustainable transition and sustainble lifestyles. The meeting was held at Mita Campus of Keo University and participated...

Integrating the Sustainable Development Goals (SDGs) into climate actions is essential for a healthy planet and people. Yet, national climate policies and international climate support programs often fail to explicitly recognize the interconnections between climate concerns and other priorities covered under the SDGs. This failure can leave key...

The response of land surface phenology (LSP) to the urban heat island effect (UHI) is a useful biological indicator for understanding how vegetated ecosystems will be affected by future climate warming. However, vegetation cover in rural areas is often dominated by cultivated land, whose phenological timing is considerably influenced by...

The transport sector is one of the main sources of global GHG emissions, of which road transport emissions are greatest. The decarbonisation of road transport requires systemic changes combined with technological interventions to optimise the use of transport modes. Given the diverse options for road transport decarbonisation due to differences in...

A global agreement to end plastic pollution must be based on pertinent, multi-disciplinary knowledge. Consideration of the full life cycle impacts of plastics and substitutes is important to achieve sustainable solutions rather than shifting the burden. Hence, this process requires considerations of fossil-based and biobased feedstocks for plastic...