Unlocking the next trillion-dollar frontier: Climate Bonds launches the new CBRT Explainer

COP30 made one thing unmistakably clear: adaptation and resilience (A&R) is no longer peripheral, it is emerging as the next trillion-dollar frontier in sustainable finance. As climate impacts intensify and adaptation needs continue to rise, the market needs clarity on what counts as a credible resilience investment. 

Responding to this momentum, Climate Bonds is releasing two new complementary resources: the CBRT Explainer – Brochure, a short, accessible introduction to the Climate Bonds Resilience Taxonomy (CBRT) and the more detailed CBRT Explainer – Guide, which offers deeper technical guidance on the taxonomy’s structure and logic. Together, these materials help users quickly understand how the CBRT can be used to identify and qualify investments that contribute to A&R. 
 
The Explainer builds on the CBRT User Guide for Corporate Infrastructure Issuers, co-developed with BCG and launched at COP30, which provides in-depth instructions for applying the taxonomy in real-world financing decisions. 

Adaptation and Resilience cannot wait

Climate disruption is already reshaping economies and communities. More than 3.5 billion people live in highly climate-vulnerable regions, and disaster exposure has increased by 80% since 2005, with the world projected to face 560 climate-related disasters per year by 2030. The recent floods in Indonesia and Sri Lanka are a stark reminder of how real climate change is and how urgently A&R finance is needed.  

These impacts come with a cost: climate-related disasters already exceed USD 330 billion annually, while the adaptation finance gap remains vast. UNEP estimates that developing countries require USD 194–366 billion per year, up to 18 times current flows. Addressing this gap could unlock up to USD 3 trillion in resilience investments by 2030. 

The USD 100 trillion global bond market is well positioned to absorb these rising costs. Clear definitions and guidance, such as those provided through the CBRT, help issuers prioritise the measures that matter most, while giving investors a trusted reference point to identify investments that genuinely contribute to strengthening resilience. 

Resilience finance is not only urgent, it is economically essential. 

CBRT is designed to guide smarter decisions

Developed with global experts and partners, CBRT identifies more than 1,400 potential investments across seven climate resilience themes, ranging from cities and infrastructure to health, agriculture, natural systems and industry. 

It defines how to classify investments as adapted (resilient themselves) or enabling (supporting resilience elsewhere), and explains how each one is assessed based on three core requirements: 

• A substantial contribution to climate A&R,
• Effective management of maladaptation risks, and
• Alignment with Do No Significant Harm (DNSH) to climate mitigation.  

By bringing structure to an emerging field, the CBRT helps the market distinguish genuine A&R investments from those that simply use the label. 

Resilience finance gains real market traction

The global debt market has already begun to adopt CBRT-based approaches. Japan marked a global milestone this year with the Tokyo Metropolitan Government’s issuance of the world’s first Certification under the Climate Bonds Resilience Criteria and Taxonomy, demonstrating that resilience investments can be assessed with the same rigour as mitigation-aligned instruments. 

Alongside this, COP30 also brought major progress from Latin America and the Caribbean. CAF, the Development Bank of Latin America and the Caribbean, announced the region’s first resilience bond, a USD 100 million deal aligned with the Climate Bonds Resilience Taxonomy. Supported by UNDRR’s technical assessment using the CBRT methodology and the jointly developed climate resilience ranking framework, the bond will finance resilient infrastructure projects across LAC, starting in Brazil. This demonstrates how issuers can apply the CBRT to structure aligned resilience transactions even ahead of certification, reinforcing the taxonomy’s usability across emerging markets. 

Together, these deals signal a turning point: the taxonomy is already shaping real transactions, across both developed and emerging markets. 

What the new CBRT Explainer adds

This new package, the CBRT Explainer Guide and the CBRT Explainer Brochure, distils the taxonomy’s core elements into a clear, practical narrative: what the CBRT is, how it is structured, and how it can be used to navigate climate resilience investments. 

It introduces how investments are classified across themes, sectors, sub-sectors and climate hazards; how adapted and enabling investments fit into the taxonomy; and how the screening logic works in practice. 

Designed as an accessible entry point for issuers, policymakers, investors, governments and taxonomy developers, it makes a comprehensive system usable from day one. 

A critical moment for scaling resilience finance

With the User Guide launched at COP30, the first Certified and aligned resilience bonds in the market, and now the publication of the Explainer, the foundations for a global resilience finance ecosystem are rapidly strengthening. In the coming weeks, Climate Bonds will release a series of short video explainers to support adoption and help users navigate the taxonomy with confidence. 

Download the CBRT Explainer materials: 

• CBRT Explainer – Guide
• CBRT Explainer – Brochure
• CBRT Explainer – Brochure in Japanese
• CBRT User Guide for Corporate Infrastructure Issuers 
   

Until next time, 

Climate Bonds