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Developers working on behalf of Google have significantly misstated the carbon emissions of two proposed AI datacentres in their planning applications to UK local councils. The error means the environmental impact of the projects was presented as five times smaller than it actually is. A third datacentre planned by a separate company in north Lincolnshire contains the same miscalculation. Taken together the three developments will account for more than one per cent of the UK’s entire carbon budget in 2033 which is roughly equivalent to the total annual emissions of a city the size of Bristol.As reported by The Guardian, the errors were identified by experts at Foxglove, a tech justice nonprofit. The mistake in each case involved comparing one year of the proposed datacentre’s emissions against the UK’s full five-year carbon budget rather than a single year’s figure. Google is seeking planning permission for two large datacentres in Essex. One is a 52-hectare project in Thurrock to be built on gray belt land. The other is at an airfield in North Weald near Epping Forest. Planning documents for the Thurrock site stated its emissions would represent 0.033 per cent of the UK’s carbon budget between 2028 and 2032. The correct figure is 0.165 per cent. The North Weald site stated emissions of 0.043 per cent of the carbon budget from 2033 to 2037. The correct figure is 0.215 per cent. The Thurrock datacentre will produce more emissions than an international airport.Greystoke’s planned Elsham Tech Park in north Lincolnshire stated its emissions would represent 0.1043 per cent of the UK’s carbon budget in 2033. The correct figure is 0.5215 per cent. At peak output the site’s emissions will reach one million tonnes of CO2 equivalent in 2033 to 2034. That is just below the 1.2 million tonnes produced by all UK domestic flights combined. Greystoke responded to The Guardian by saying it expected to submit revised figures to the local planning authority as part of the planning process.Tim Squirrell, head of strategy at Foxglove, told The Guardian that Google had serious questions to answer about its pollution figures. He said that by comparing one year of datacentre emissions with five years of UK emissions the developers were making the environmental impact look five times smaller than it really was. He said that unless Google could explain the discrepancy it appeared the council and the public were being seriously misled about the climate impact of the facilities.









