Mangrove Restoration Economies and Coastal Resilience in the Global South Why Nature-Based Solutions Represent the Highest-Return Polycrisis Mitigation Investment Available

Coastal regions across the Global South sit at the intersection of accelerating sea-level rise, cyclone intensification, saltwater intrusion, ecosystem degradation, food insecurity, and fiscal vulnerability. This report examines mangrove restoration as a multidimensional nature-based solution capable of addressing these pressures simultaneously, reframing mangrove ecosystems from conservation assets into productive natural infrastructure and a foundation for coastal economic resilience. Drawing on hydrodynamic, ecological, economic, fisheries, and climate-finance evidence, the analysis finds that intact and restored mangroves can substantially attenuate wave energy, reduce disaster losses, accumulate exceptionally dense and persistent blue carbon, support fisheries and community livelihoods, and provide significantly higher lifecycle economic returns than conventional grey coastal defenses. The report further distinguishes effective hydrology-first Ecological Mangrove Restoration from conventional monoculture planting approaches, which exhibit substantially higher failure rates. Regional analysis spanning the Sundarbans, Southeast Asia, West Africa, and the Neotropics demonstrates both the scale of coastal exposure and the opportunity for restoration-led development. The report evaluates emerging financing architectures—including high-integrity blue carbon markets, Article 6 mechanisms, debt-for-nature swaps, blue bonds, and parametric coastal insurance—as pathways for converting ecosystem services into durable capital flows. It concludes with a 2026–2035 strategic roadmap centered on community tenure reform, hydrological restoration, sustainable silvofisheries, sovereign blue-carbon integration, and regional risk-financing mechanisms, ultimately positioning mangrove restoration as a scalable strategy for transforming coastal vulnerability into long-term ecological, economic, and sovereign resilience.