How to Unlock Climate Finance for Green Infrastructure

As the Paris Agreement's deadline of 2030 soon approaches, the need to align global finance with sustainability has become increasingly urgent. 

With trillions of dollars in infrastructure investment at stake, the question lies of how can industries take action. 

“Success looks like getting people in the room who aren’t there yet and making sure everyone, from local to global levels, works together to scale private investment,” says Barbara Buchner, Global Managing Director at the Climate Policy Initiative

Mobilising private capital towards climate-smart, inclusive development is essential and this requires clarity, coordination and commitment across public and private sectors.

Transforming investment

Climate finance is being driven by a range of structural and market forces, influencing and updating how capital is directed.

One major trend is the surge in sustainable urban development. 

As more than half the world’s population now lives in cities, according to the United Nations Statistics Division (UNSD), there is a growing push to build greener, more resilient urban infrastructure. 

From energy-efficient buildings to sustainable water systems and mobility networks, private investment in urban sustainability is rising fast.

Another force reshaping the sector is the rapid shift toward clean energy systems. 

Declining costs in renewables, energy storage and smart grids have significantly lowered entry barriers. 

As a result, private capital is increasingly flowing into energy infrastructure projects that support the transition to net zero.

The transport sector is also undergoing transformation, with the rise of EVs and low-carbon mobility solutions. 

Investment in EV infrastructure is expanding in parallel with adoption, creating new opportunities to decarbonise one of the most emissions-intensive sectors.

Financial innovation is opening additional pathways. 

Green bonds, sustainability-linked loans and impact investment funds are enabling private actors to align their portfolios with environmental and social outcomes. 

These instruments are now mainstreaming sustainable finance across global markets.

To close financing gaps and reduce risk, blended finance and public-private partnerships (PPPs) are proving to be essential. 

By combining concessional public finance with commercial capital, blended models can unlock large-scale investment and attract institutional investors to underserved markets.

Technology is also making climate finance more data-driven, transparent and efficient. 

Tools like climate risk analytics, satellite monitoring and blockchain are improving project evaluation and enabling better risk management across the investment lifecycle.

Global attitudes to climate finance

At COP29 in Baku, climate finance took centre stage as developed nations agreed to a significant, though debated, uplift in financial support for developing countries.

The “Baku Climate Unity Pact” saw a commitment to triple existing funding from US$100bn annually to at least US$300bn by 2035.

This forms part of the New Collective Quantified Goal on Climate Finance (NCQG), which aims to mobilise US$1.3tn per year from public and private sources to aid mitigation and adaptation efforts in the Global South.

However, many developing countries criticised the deal as falling short, noting that their external finance needs could reach US$1.46tn annually by 2030. 

Concerns were also raised about the lack of a robust framework for adaptation and loss and damage support.

To maintain momentum, the pact includes a “Baku-Belem Roadmap to US$1.3tn” leading up to COP30 in Brazil.

Complementing the main outcomes, the World Bank and Multilateral Development Banks pledged US$120bn per year by 2030 to support low- and middle-income countries.

Looking ahead, New York Climate Week 2025 will serve as a pivotal moment to maintain pressure and encourage further financial commitments, though as of late July, no major new pledges have been announced.

What does success in climate finance mean?

Success in scaling sustainable infrastructure finance depends on more than just capital volumes. 

It begins with scale, measured not just by the total investment but also the span of stakeholders involved. 

That includes bringing in institutional investors who may not have traditionally engaged with climate-aligned infrastructure, as well as national and local actors who understand ground-level realities.

Climate-related risks, from extreme weather events to regulatory changes, must be embedded into investment decision-making from the start. 

Treating these risks as strategic priorities, rather than afterthoughts, helps investors price long-term value more accurately and build more resilient portfolios.

Equity and access are equally important. 

A truly successful climate finance strategy should ensure that essential services such as housing, transport and energy are accessible to all, particularly to marginalised and vulnerable populations. 

Inclusive development is not just a social goal, but a foundational principle of climate resilience.

Global frameworks

Global climate finance is supported by a growing set of public-private initiatives and multilateral frameworks designed to align investment with climate goals.

One key initiative is FAST-Infra (Finance to Accelerate the Sustainable Transition–Infrastructure), which aims to make sustainable infrastructure a mainstream, investable asset class.

By providing a consistent and credible way to assess whether infrastructure projects are sustainable, the label helps investors make more confident and informed decisions.

Its value lies in harmonisation, reducing fragmentation across markets and aligning different players around shared definitions of what sustainable infrastructure looks like. 

Central to FAST-Infra is the Sustainable Infrastructure (SI) Label, which certifies that projects deliver positive sustainability outcomes across their life cycle.

The framework behind the label covers four pillars: environmental, social, governance and resilience, aligning with the UN Sustainable Development Goals.

“The FAST-Infra Label could actually become the de facto standard, it brings harmonisation and standardisation that can really help scale up investments,” comments Barbara.

Broader climate finance is structured under the UNFCCC and the Paris Agreement, with instruments like the Green Climate Fund, Adaptation Fund and emerging Loss and Damage Fund playing central roles.

At COP29, nations agreed to a new climate finance target, U$300bn annually in public finance by 2035, and a broader mobilisation goal of US$1.3tn from all sources.

Market-based mechanisms such as carbon trading (under Article 6 of the Paris Agreement) are also expanding.

Despite finance flows exceeding US$2tn in 2024, challenges remain in ensuring equitable access, adequate adaptation funding and transparent reporting.

Together, these frameworks aim to make climate finance more accessible, effective, and aligned with global climate and development priorities.

By aggregating smaller deals into bankable portfolios, industries can attract institutional capital and help build a robust pipeline of climate-smart infrastructure.

Climate finance as a foundation for resilience

Climate finance groups are essential for mobilising funds to support climate action, especially in developing countries:

• The Green Climate Fund (GCF) is the largest global climate fund, financing mitigation and adaptation projects through a flexible, country-led approach.
• The Coalition of Finance Ministers for Climate Action (CFMCA) promotes integrating climate resilience into national budgets and economic planning.
• Multilateral Development Banks (MDBs) and the World Bank provide significant complementary funding for low-carbon and resilient development.
• The Global Innovation Lab for Climate Finance fosters new financial instruments to unlock private capital for climate projects.
• The Climate Policy Initiative (CPI) tracks global finance flows and provides analysis to guide investment and policy decisions.
• The Climate Brick offers open-source guidance to climate tech start-ups, outlining tailored scaling and funding strategies.

Together, these organisations and platforms form a dynamic climate finance ecosystem driving capital towards a more sustainable future.

A question for the future

As COP30 approaches, a key question for climate finance is whether the global financial system can deliver investment that is both fast and fair, serving people and planet alike.

While frameworks and tools have advanced, the challenge now is turning ambition into action at scale.

The focus must shift from pledges to implementation, with COP30 offering a critical opportunity to align public and private finance around clear, inclusive outcomes.

Success will depend not just on how much capital is raised, but how effectively it is deployed. Investment must prioritise resilience, equity and access, especially in cities, clean energy and transport, where infrastructure needs are rapidly growing. 

Tools like blended finance and public-private partnerships must be scaled to reduce risk and attract institutional capital to emerging markets.

Standards such as the FAST-Infra Label can help harmonise definitions and build investor confidence, while digital innovation can improve transparency and risk management.

However, impact will only be achieved if local stakeholders are empowered to lead, ensuring investments meet real-world needs. COP30 will be a test of global coordination and political will, whether finance can truly become the foundation of a just, climate-resilient future.