Data centre debate heats up ahead of US midterms - here's what you need to know

Data centers, vast warehouse-like structures, form the backbone of our internet usage, powering everything from web searches to online banking. They also play a pivotal role in the AI boom, housing advanced computer chips and servers needed for services like ChatGPT and Claude. However, their rapid expansion, massive electricity consumption, and environmental concerns have sparked a backlash worldwide.

In the United States, this issue has become a significant topic ahead of the midterm elections on November 3rd. Both Republicans and Democratic opposition are coming out against data center development, putting them on a collision course with US President Donald Trump. The president dismisses the opposition as "a sick conspiracy," despite growing public anger.

There are approximately 12,250 data centers globally, up from around 8,000 in 2021. These centers are most densely clustered in the U.S., with 4,767 sites, followed by Europe, where the UK and Germany lead. Historically, data centers were located near cities for easy access to high voltage power lines or water resources for cooling. However, as they grow larger, many are now being built in rural areas.

The U.S. leads in data center capacity, with China in second place and Europe trailing far behind. This gap is expected to widen, potentially leading Europe to miss out on the economic benefits of the AI boom. Data centers vary greatly in size, from small structures to expansive sites. The world's largest operational data center is China Telecom's in Hohhot, Inner Mongolia, covering about one million square meters.

This growth comes with significant environmental impacts. Data centers consume more electricity than the entire country of France, driving up carbon emissions and putting pressure on local grids. Some fear this could lead to increased energy prices. Concerns about water usage for cooling and noise pollution have also sparked local opposition.

In the U.S., 16 states have proposed laws to ban or temporarily block new data centers. This issue is expected to be a key topic in the upcoming midterm elections. Supporters argue data centers are vital for national security, AI development, and economic growth, attracting investment and creating jobs. A report by the Brookings Center suggests data centers do create local jobs, though fewer than industry advocates claim.

The debate over data centers continues, with the tech industry spending a projected $765 billion on AI infrastructure in 2026, rising to over $1 trillion the following year. To address environmental concerns, some suggest putting data centers in space or on the Moon, harnessing abundant solar energy. Others predict AI processing could eventually be carried out by the hardware already inside our devices, reducing the need for vast data centers.