#Greeninfrastructure

Southeast Asia’s urban centres are facing unprecedented challenges as they attempt to finance the transition to sustainable, resilient, and climate-friendly cities, according to the latest analysis by the Organisation for Economic Co-operation and Development (OECD). The report—“Financing Sustainable Cities in Southeast Asia”—delves into the critical question of how city governments in the rapidly urbanising ASEAN-5 (Indonesia, Malaysia, the Philippines, Thailand, and Vietnam) can marshal the investments necessary to achieve their ambitious sustainability agendas. Against a backdrop of rising carbon emissions, increased climate risks, and mounting infrastructure needs, the report’s findings have major implications for cities across the region, including Bangkok, Chiang Mai, and other key Thai urban areas.

Southeast Asia’s urban transformation stands at a critical crossroads, with cities across the region—including Bangkok, Chiang Mai, and emerging Thai metropolitan areas—facing an unprecedented financing crisis that threatens their sustainable development ambitions. A groundbreaking analysis by the Organisation for Economic Co-operation and Development reveals how rapidly growing ASEAN cities are struggling to secure the massive investments required to combat climate change, manage urban growth, and build resilient infrastructure systems. For Thailand, these findings expose fundamental weaknesses in municipal finance structures that could determine whether the kingdom’s cities evolve into sustainable models or become cautionary tales of missed environmental opportunities.

A regional financing crunch is reshaping Thailand’s urban future. Bangkok, Chiang Mai, and other growing Thai cities face a widening gap in funding for climate resilience, sustainable transport, and smart urban planning. New analysis by the OECD shows Southeast Asian cities struggle to attract the trillions needed for green investments, spotlighting weaknesses in municipal finance that could steer Thailand toward cautious or lagging development if left unchecked.

Urban growth in Southeast Asia is accelerating. The United Nations projects that more than three‑quarters of people in the region will live in cities by 2050, a shift that magnifies pressure on transportation, water systems, waste management, and energy grids. For Thai policymakers, these projections highlight why Bangkok’s flooding, Chiang Mai’s air quality challenges, and housing shortages in provincial towns demand urgent, locally tailored financing strategies to avoid escalating costs and missed opportunities.

Southeast Asia’s dynamic cities are at the forefront of the global push toward sustainability, but a new report by the Organisation for Economic Co-operation and Development (OECD) sheds light on daunting obstacles facing city governments as they work to build cleaner, more inclusive, and climate-resilient urban environments. As detailed in the OECD’s latest publication, “Financing Sustainable Cities in Southeast Asia” (OECD), Southeast Asia’s urban population is rising rapidly, placing unprecedented pressure on sanitation, housing, transportation, and climate adaptation measures—yet local authorities struggle to marshal the funding, expertise, and institutional backing needed to deliver ambitious green infrastructure.

Urban centers across Southeast Asia confront an unprecedented challenge as they struggle to finance the green infrastructure necessary for sustainable development and climate resilience. A comprehensive analysis by the Organisation for Economic Co-operation and Development reveals that while Southeast Asian cities lead ambitious sustainability initiatives, local governments lack the financial resources, institutional capacity, and policy frameworks needed to transform urban environments at the pace required by growing populations and climate threats. This funding crisis threatens to derail regional progress toward international commitments including the Paris Agreement and Agenda 2030 for Sustainable Development.

A growing funding crisis threatens Southeast Asia’s push toward sustainable, climate-resilient cities. An OECD analysis shows that while regional capitals lead bold sustainability efforts, local governments often lack sufficient resources, institutional capacity, and clear policy frameworks to modernize rapidly amid rising populations and climate threats. The gap jeopardizes progress toward international goals such as the Paris Agreement and the 2030 Agenda for Sustainable Development.

In Thailand, nearly half the population now lives in urban areas anchored by Bangkok’s economic engine. Thai cities face major infrastructure upgrades—from mass transit to flood defenses—while fiscal constraints hinder their ability to raise funds or attract private investment. The disconnect between ambitious plans and available financing drives key policy debates for city leaders aiming to grow responsibly while protecting the environment.

A bold shift is underway in Bangkok as the city embraces green, water-smart design to cope with floods and subsidence. Sponge parks are being engineered to absorb, store, and gradually release rainwater, transforming how communities live with water and protect neighborhoods, heritage, and the economy.

Urban expansion has eroded natural flood defenses. Paved roads, dense development, and vast construction replaced wetlands and rice fields. The 2011 floods, which caused loss of life and long-term displacement, underscored the need for a different approach. Bangkok now pursues nature-based solutions, aiming to create 500 urban parks by 2026. Projects at Chulalongkorn University Centenary Park and Benjakitti Forest Park illustrate this broader green infrastructure push in Thailand’s capital, supported by collaboration among universities and local agencies.