This report provides an assessment of the use of, and recommendations for scaling up, Nature-based Solutions to address water-related climate risks.

This report provides a synthesis of the OECD Net Zero+ project, covering the first phase of an ongoing, cross-cutting initiative, representing a major step forward for an OECD whole-of-government approach to climate policy.

The blue economy is a major driver of urban and regional development, creating millions of local jobs in water-dependent sectors such as fisheries, tourism, and shipping. However, it can also contribute to carbon emissions and ecosystem degradation, while its reliance on freshwater, coastal and marine ecosystems exposes it to the impacts of climate change. As the places where the blue economy takes place, creates value and provides jobs, cities and regions play a key role in unlocking the potential of a resilient blue economy that preserves the ecosystems that sustain it. Building on a global survey of 80+ cities, regions and basins, this report highlights the costs and benefits of the blue economy at subnational level, shedding light on the link between the blue economy and water security. This analysis provides an overview of the multi-level governance of the blue economy and related gaps. It calls on cities and regions to develop resilient, inclusive, sustainable and circular (RISC-proof) blue economies by establishing the right governance conditions related to policy making, policy coherence and policy implementation. The report concludes with a RISC Assessment Framework that offers a self-evaluation tool for subnational governments.

This report presents a summary of the key challenges and opportunities related to financing that contributes to water security and sustainable growth distilling insights from the Roundtable on Financing Water and related analyses. It covers a broad range of water-related investments, including water and sanitation services, water resources management, agricultural water and managing water-related risks (“too much”, “too little” and “too polluted”).

This report provides an overview of green infrastructure planning and the use of nature-based solutions in Italy. It identifies key challenges and trade-offs and provides recommendations to promote their uptake across the different levels of government.