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東南アジア地域における急速な都市化と消費拡大に伴い、プラスチック廃棄物の発生量が急増し、プラスチック汚染が特に深刻な課題となっている。ASEAN諸国では、使い捨てプラスチックの禁止、拡大生産者責任（EPR）制度、普及啓発キャンペーンなど、さまざまな対策が進められている。しかし、これらの対策だけでは、根強く定着した消費行動を変えるのは難しい。 利用制限や普及啓発だけで十分な効果が得られないような課題に対し、行動科学は有効な補完的アプローチとなる。Behaviour-Centred （行動に関する理解に基づく、行動に焦点を当てた）アプローチを取り入れることで、単なる情報提供や経済的インセンティブに頼るのではなく、「意図と行動のギャップ」を埋め、持続可能な行動変容を促すことができる。...

Plastic pollution is a growing challenge in Southeast Asia, where rapid urbanisation and rising consumption are driving sharp increases in plastic waste. While traditional regulations such as plastic bans and information campaigns are important, they often fail to shift deeply ingrained consumption and waste management habits on their own. This new...

From "Islands of Excellence" to a "Sea of Change": How ASEAN's Secondary Cities are Localising the SDGs in the region As the ASEAN region rapidly urbanises, the focus often falls on its mega-cities. However, a quiet transformation is underway in the region’s secondary cities -- the agile urban centres that are proving to be fertile ground for...

This report provides a baseline assessment of Cambodia’s informal waste sector, with a focus on Phnom Penh and Battambang. Informal waste workers, including street pickers, door-to-door collectors, pickers at landfills and junkshop operators, play a critical yet undervalued role in the country’s waste management system. They are responsible for a...

The 'National Workshop on Enhancing the Capacity of the Informal Waste Recycling Sector Towards a Zero Waste Society' concluded with a plenary discussion on government support for informal sector integration, acknowledging the existing technical support provided by the Ministry of Environment and the potential for collaboration with the Ministry of...

The Methane Reduction Roadmap for Cambodia sets out a strategic plan to cut methane emissions and align with global climate goals, including the Global Methane Pledge and Cambodia’s Long-Term Strategy for Carbon Neutrality. Developed by the Ministry of Environment with support from IGES and CCAC, the roadmap targets three major sectors— agriculture...

IGES Joint Crediting Mechanism (JCM) Database provides detailed information on the JCM methodologies, projects, and JCM feasibility studies to be utilized for research and development of JCM project. The JCM is being implemented under bilateral cooperation between Japan and 29 partner countries: Mongolia, Bangladesh, Ethiopia, Kenya, Maldives, Viet...

(1) The enactment of Sub-Decree No. 113/2015 on Solid Waste Management marked a significant policy shift towards the decentralisation of waste management in Cambodia and some progress has been observed in Phnom Penh and some other large cities and tourist destinations. However, information in rural areas is lacking. Rapid and simple waste...

Solid waste management is a critical issue that affects both the environment and public health, posing significant challenges to communities and governments worldwide. In Cambodia, like in many developing nations, effective solid waste management is a pressing concern due to rapid urbanization, population growth, and industrialization. The rise in...

Open waste burning is a widespread practice that is provoked by a lack of systematic waste collection, the unavailability of other disposal options, and inadequate land for the final disposal of the collected waste, especially in low- and middle-income countries. From a global perspective, two billion people have no waste collection at all, and the...