Protecting the Sundarbans: Mangrove restoration, biodiversity conservation and blue carbon financing

On the occasion of World Environment Day, observed under the theme "Inspired by Nature, for Climate. For Our Future," renewed global attention is being drawn to ecosystem restoration as a cornerstone of climate action. 

The Sundarbans, a UNESCO World Heritage Site, represents the world's largest continuous mangrove ecosystem and a critical natural infrastructure for climate regulation, disaster risk reduction, and biodiversity conservation.

The Sundarbans sustains rich biological diversity, including the flagship, emblematic Royal Bengal Tiger, alongside numerous aquatic and terrestrial species that support ecological balance and millions of coastal livelihoods. 

However, this globally significant ecosystem is increasingly under stress due to climate change impacts, sea-level rise, salinity intrusion, reduced freshwater inflow, pollution, and unsustainable resource extraction.

Ecosystem restoration inspired by nature

In alignment with this year's theme, mangrove restoration in the Sundarbans represents a direct nature-based response to climate vulnerability. Mangroves function as highly effective nature-based solutions (NbS), offering both mitigation and adaptation benefits. They sequester substantial blue carbon, stabilise coastlines, reduce erosion, and act as natural buffers against cyclones and storm surges.

Restoration of the Sundarbans ecosystem must therefore be viewed as a strategic climate investment aligned with Nationally Determined Contributions (NDCs) and ecosystem-based adaptation priorities under the Paris Agreement. A science-led, landscape-scale restoration approach is essential to ensure long-term resilience and ecological integrity.

Blue carbon as a climate and finance opportunity

The Sundarbans also presents significant opportunities to translate ecosystem restoration into climate finance through blue carbon mechanisms. With robust Measurement, Reporting and Verification (MRV) systems aligned with international standards, Bangladesh can access results-based finance through voluntary carbon markets and Article 6 mechanisms.

Carbon credits generated from conservation and restoration activities can be reinvested into ecosystem management, community resilience, and climate-resilient infrastructure, strengthening the link between nature, climate action, and sustainable development.

Global experience and nature-based solutions

International experience demonstrates that nature-based climate solutions deliver strong environmental and socio-economic co-benefits:

Indonesia has scaled up mangrove restoration linked with blue carbon finance and coastal livelihood enhancement. Vietnam has integrated mangrove ecosystems into national coastal defence and disaster risk reduction strategies. 

Kenya has advanced community-led mangrove carbon projects with verified credit generation and equitable benefit-sharing. Costa Rica has institutionalised ecosystem restoration through Payment for Ecosystem Services (PES), aligning forest conservation with long-term climate finance and biodiversity protection.

These examples underline that effective ecosystem restoration depends on strong governance, inclusive community participation, credible carbon accounting systems, and sustained financial mechanisms.

Strategic Priorities for Bangladesh

• Formulate a national blue carbon framework integrating mangroves into climate and biodiversity strategies
• Strengthen MRV systems for coastal wetland carbon accounting in line with global standards
• Scale up ecosystem-based restoration across degraded mangrove and buffer zones
• Enhance community co-management and equitable benefit-sharing mechanisms
• Expand access to Article 6 and voluntary carbon markets for climate finance mobilisation
• Strengthen transboundary cooperation for integrated Sundarbans management
• Improve monitoring, enforcement, and compliance systems to safeguard ecosystem integrity

Guided by the theme "Inspired by Nature, for Climate. For Our Future," the Sundarbans stands as a living example of how nature-based solutions can shape resilient development pathways. Its conservation is fully aligned with global commitments under the UNFCCC, the Paris Agreement, and international biodiversity frameworks.

Protecting the Sundarbans today is about drawing inspiration from nature to secure climate stability, ecological resilience, and a sustainable future for generations to come.

Mohammad Navid Safiullah is the Additional Secretary of the Ministry of Environment, Forest and Climate Change

Disclaimer: The views and opinions expressed in this article are those of the author and do not necessarily reflect the opinions and views of The Business Standard.