AI turns to green bonds

ARTIFICIAL intelligence (AI) infrastructure developers are increasingly turning to green bonds and sustainability-linked loans to fund the next wave of AI data centres (DCs), as the industry seeks to balance surging computing demand with growing environmental scrutiny.

The shift comes as developers race to secure capital for what is expected to be one of the largest infrastructure investment cycles in decades, while also trying to reassure investors, regulators and local communities that the rapid expansion of DCs can be compatible with sustainability goals, according to a Bloomberg report.

Although DCs have traditionally been criticised for their heavy electricity consumption, water usage and reliance on fossil fuel-powered grids, companies are increasingly positioning new facilities as more energy-efficient and powered by renewable energy.

Green financing is emerging as a key tool to support that narrative, the newswire noted.

Bloomberg recently highlighted that DC entities have issued US$186bil in sustainable debt since late 2022, when OpenAI’s launch of ChatGPT accelerated global investment in AI infrastructure.

Citing a report by Sustainable Fitch released last month, Bloomberg said annual issuance reached a record level last year, highlighting the growing role of environmental, social and governance (ESG)-linked financing in supporting AI-related expansion.

The financing trend reflects the enormous capital required to build AI infrastructure.

Industry estimates suggest the global AI buildout could require as much as US$7 trillion by 2030, prompting developers to tap virtually every available funding source, including the green debt market.

At the same time, sustainability credentials are becoming increasingly important as resistance to large-scale DC development grows.

According to Bloomberg, opposition from local communities is becoming a more significant hurdle for developers.

Research firm Data Center Watch found that coordinated community campaigns blocked or delayed at least 48 DC projects worth a combined US$156bil in 2025.

The regulatory landscape is also becoming more challenging.

Moreover, Bloomberg reported that New York recently became the first US state to impose a moratorium on new hyperscale DCs, giving policymakers more time to develop a regulatory framework and assess the impact of large facilities on electricity costs and the environment.

Against that backdrop, several major operators, including QTS Realty Trust Inc, Compass Datacenters LLC and AirTrunk Operating Pty Ltd, have issued green debt this year to finance projects that incorporate renewable energy, energy-efficient building designs, battery storage and improved water management.

Luke Stephens, AirTrunk’s treasurer, told Bloomberg the company expects to raise between US$4bil and US$5bil through sustainability-linked loans over the next two to three months.

“The need for companies to have clear and articulated community and social agendas is only going one way – and that’s increasing,” he said.

“Sustainable financing is a great way to evidence those commitments.”

Environmental accountability

Beyond raising capital, industry observers say green financing is increasingly serving as a reputational tool.

Green bonds have long appealed to ESG-focused investors willing to accept slightly lower returns in exchange for supporting environmentally beneficial projects, creating what is often referred to as the “greenium”.

For AI infrastructure developers, however, Bloomberg reported that the more immediate benefit may be demonstrating environmental accountability as concerns over electricity and water consumption intensify.

“It is very much a reputation and political move right now,” Todd Cort, a sustainable finance researcher at the Yale School of Management, told Bloomberg.

The debate is playing out on the ground across several US states.

Bloomberg highlighted Fayette County in Georgia, where QTS is developing a large DC campus that has attracted Microsoft Corp as a tenant.

The project has generated bipartisan concerns among local residents over electricity demand and water consumption.

“Environmental concerns are real here on the ground,” James Clifton, a Republican campaigning on an anti-DC platform for a county position, told Bloomberg.

QTS raised US$4.6bil through the green bond market in April to help finance the development.

The proceeds can be used for projects that meet specified energy-efficiency standards, expand renewable energy procurement, instal solar, wind and battery systems, and secure renewable power purchase agreements.

The company has also updated its green financing framework to include sustainable water management initiatives.

In a statement cited by Bloomberg, QTS said the project’s water consumption would account for less than 1% of Fayette County Water’s current production and that a typical building would use water roughly equivalent to the monthly consumption of fewer than five American households.

Even so, investors are expected to examine sustainability claims more closely as AI infrastructure expands.

Chris Ratti, Bloomberg Intelligence’s senior sustainable finance analyst, said scrutiny of the sector is likely to intensify as electricity and water demand continue to rise.

“Investor scrutiny of DCs’ sustainability credentials will likely intensify as power and water use rises,” he said in a recent report.

“Yet renewable-power sourcing, efficiency gains and green-building design should keep green-labelled debt open for developers”.

The growing investment requirements are also encouraging ESG-focused fund managers to remain engaged with the sector rather than step away from it.

“They’re asking for a lot of money over the next several years,” Anuj Gulati, global head of fixed income ESG strategy and research at Calvert Research and Management, told Bloomberg.

“And we have a say in this, at least.”

While green financing may also provide modest funding advantages, Bloomberg reported that the savings remain relatively limited.

Compass Datacenters chief investment officer Jonathan Schildkraut said issuing green debt reduced borrowing costs by only a few basis points, although the company considered it a natural fit given its existing sustainability initiatives.

“We don’t go and do green things to get sustainable-linked credit,” he said.

“If there are things that we do and there are available reductions in our interest costs as a result, we take advantage of it.”