PODCAST: Behind the Prompt- Data Centres, Water, and Australia's Energy Crunch

Posted by Tim Prosser | Founding Director, Sustainably Digital

I recently joined the Green Fix Podcast to talk about one of the most urgent — and underreported — issues in digital sustainability. Here's why you need to listen.

If you work in digital sustainability, you already know that the conversation around technology's environmental footprint is evolving fast. But how fast? And are we — as practitioners and professionals — truly keeping pace with what's happening beneath the surface of every AI prompt, every cloud workload, every digital interaction?

I recently had the privilege of sitting down again with Dan Leverington and Loreto Gutierrez on The Green Fix Podcast for a deep-dive conversation that I genuinely believe every digital sustainability professional needs to hear. We covered ground that is moving from the margins of our industry straight to the centre — and fast.

Here's a taste of what we unpacked.

🔌 The Invisible Energy Behind Your AI Tools

Most corporate sustainability teams are still laser-focused on supply chain emissions and business travel. And fair enough — those have historically been the big levers. But there's a rapidly growing blind spot that demands our attention: the physical infrastructure powering our digital activity.

Every prompt to a generative AI tool. Every AI-generated image or video. Every cloud-based computation. Each one triggers a very real, very physical chain of energy consumption and resource use that most organisations simply aren't accounting for.

To put it in perspective: a single 100-megawatt data centre consumes power and fresh potable water at levels comparable to up to 150,000 homes. And with billions of AI computations being processed daily, data centres are now among the fastest-growing energy consumers on the grid.

In Australia alone, the data technology sector could account for as much as 11% of total national electricity consumption by 2035 — up from just 1–2% today. That's not incremental growth. That's a seismic shift in our energy landscape.

⚡ Australia's Grid Is Already Under Pressure

This is where the conversation got particularly compelling. Loreto raised the extraordinary tension at the heart of Australia's AI ambitions: AI is projected to add $600 billion to Australia's GDP by 2030 — but it also has the potential to drive power prices up by as much as 26% in New South Wales.

I shared findings from a late-2025 study by the Clean Energy Finance Corporation (CEFC) that projects a reliability gap in New South Wales by 2033–34 if current renewable commitments and coal retirements proceed without additional investment. The numbers are sobering:

• 3.2 gigawatts of new renewable generation needed beyond existing commitments

• 1.9 gigawatts of additional storage capacity — all by 2035

• Coordinated planning across generation, storage, and transmission is non-negotiable

And here's the macroeconomic kicker that our profession often overlooks: rising energy prices feed directly into the consumer price index, sustaining elevated inflation and compelling the Reserve Bank to keep interest rates high. This isn't just an environmental issue. It's an economic one.

📊 Why Annual Offsets Are No Longer Good Enough

We also tackled one of the most persistent — and increasingly problematic — responses to corporate emissions: the offset.

With approximately 97% of emissions reporting frameworks aligned to the Greenhouse Gas Protocol — which is currently under review for Scope 2 emissions, with potential implementation changes as early as 2027 — the pressure on Scope 2 reporting integrity is building quickly.

The emerging gold standard? 24/7 hourly matching of electricity consumption with clean generation. This is the approach being pioneered by Google and Microsoft, and it represents a genuine step-change from annual offsetting toward physical decarbonisation. Time-stamped energy certificates, already being developed in Europe, are designed to incentivise battery storage and grid flexibility — the essential ingredients for truly greening the grid.

If your organisation's net zero strategy still relies primarily on annual unbundled offsets, this conversation is essential listening.

🏭 From Passive Power Consumer to Virtual Power Plant

One of the most exciting dimensions of our discussion was the question Loreto posed: Can data centres evolve from being passive power consumers into active grid assets?

The answer, I'm pleased to say, is yes — and we're beginning to see it happen. Through large-scale battery storage, AI-optimised workload scheduling, and participation in virtual power plants (VPPs), data centres have the potential to:

• Store excess renewable energy and release it during peak demand

• Provide frequency control services that help balance the grid

• Reduce evening peak load pressure — one of the grid's most critical stress points

A compelling real-world example? Google DeepMind's AI-powered cooling optimisation, which has reduced data centre energy consumption by as much as 40% while maintaining full operational reliability.

💧 Water: The Cooling Crisis Nobody's Talking About Enough

And just when you thought the conversation couldn't get more relevant, we turned to water.

Traditional air-cooling systems in data centres are extraordinarily water-intensive. In late 2025, the mayors of Melbourne, Sydney, and Hobart joined global city leaders under the C40 Cities initiative to raise the alarm — and rightly so.

The shift to direct-to-chip liquid cooling is no longer a nice-to-have innovation. It's becoming a critical lever in reducing data centres' freshwater footprint, particularly as cities grapple with increasing water scarcity pressures.

🎧 Ready to Go Deeper?

This episode is genuinely one of the richest conversations I've had on the intersection of digital infrastructure, energy systems, and sustainability strategy. Whether you're advising clients on their digital footprint, developing corporate sustainability reporting frameworks, or simply trying to stay ahead of the curve in our rapidly evolving field — this is essential listening.

Tune in to The Green Fix Podcast — "Behind the Prompt: Data Centres, Water, and Australia's Energy Crunch" — available now wherever you listen to podcasts. Apple, Spotify, Buzzsprout

Reference Links

1. Data centre boom to reshape Australia’s energy future [CEFC Dec 2025]

2. Mayors of Melbourne {Sydney, Hobart} and Phoenix call for local leaders to join global initiative on responsible and inclusive data infrastructure [City of Melbourne Nov 2025]

3. Expectations of data centres and AI infrastructure developers [Australian Federal Government March 2026]

4. Scope true - an initiative advocating for common sense reform to the updated Greenhouse Gas Protocol Scope 2 Guidance to enable credible clean energy claims, reflect grid realities, and advance true grid decarbonisation. [scopetrue.org]

5. Scaling Data Centres Without Derailing Net Zero: Transition Risks and Investor Priorities [Accela Research, Jan 2026]