CO2 from UK data centres could be ‘hundreds of times’ higher than thought

Emissions from the new data centres set to drive the UK’s AI “revolution” could be hundreds of times higher than government estimates, according to analysis by Carbon Brief.

There are dozens of data centres being developed across the country, potentially driving a surge in electricity demand.

Amid uncertainty about the scale and pace of this expansion, there are mounting concerns that new data centres could pose a threat to the nation’s climate goals.

UK government analysis concluded that the emissions from data centres would be negligible, even if they expand rapidly – a finding one campaigner tells Carbon Brief is “nonsense”.

In contrast, Carbon Brief analysis finds that emissions from powering data centres could be far higher than the government figures suggest, if at least a small amount of the electricity they need is generated by burning gas.

Data centres could run entirely on low-carbon electricity, but some in the sector have argued that the government’s AI ambitions require the UK to use more gas power.

If new data centres source a large amount of their power from gas, it could cause carbon dioxide (CO2) emissions equivalent to at least Denmark’s annual total.