Data centres have existed for decades. So why are they so controversial now?

The Conversation , CC BY-SA Until recently, data centres attracted relatively little public attention.

They were largely treated as invisible pieces of digital infrastructure: essential but rarely discussed outside technical and industry circles.

But over the past 12 months across Australia, data centres have become the subject of intense political debate, community opposition, planning disputes and parliamentary inquiries .

Questions are being raised about how much electricity and water they use, where they should be built, who should pay for the infrastructure needed to support them, and whether Australia benefits from their continued expansion.

These questions are feeding into government policy.

Following Prime Minister Anthony Albanese’s speech at the University of Sydney in July, a National Cabinet meeting in August reaffirmed plans to legislate nationally consistent mandatory standards for large data centres by early next year.

These will include requirements around their energy, water and land use.

So how did a piece of digital infrastructure that once attracted relatively little public attention become such a prominent policy issue? Data centres themselves are not new.

What has changed is their scale, purpose and the resources required to support their growth.

Data centres have existed for decades.

But something has changed, and this essential infrastructure is now at the centre of a major policy debate.

This article is part of The Conversation’s series on data centres – what they are, why we need them, and why they’re suddenly so controversial.

The evolution of data centres Data centres are specialised physical facilities that house servers, networking equipment and data storage systems.

They are foundational infrastructure for the modern digital economy, supporting a wide range of services such as streaming, social media, banking, emergency response systems, and artificial intelligence (AI).