4% increase in emissions: a threshold exceeded
The Energy Information Administration (EIA) recorded a 4% increase in carbon emissions in the U.S. energy sector for 2026, a value higher than the overall economic growth (+2%). This deviation is not attributable to cyclical or seasonal factors. The data was produced in a context of accelerated expansion of data centers powered by synthetic systems for artificial intelligence, which are requiring instantaneous power levels exceeding 100 MW per site.
The physical mechanism is the saturation of regional electricity grid interconnection capacities. Data centers cannot be supplied with immediate renewable energy because the average time to complete interconnection in systems like ERCOT exceeds five years, and in some cases over nine years for Californian projects. The pressure on the grid leads to a restructuring of the production mix: coal-fired power plants, with shorter start-up times compared to intermittent renewable sources, are activated as immediate backup.
This dynamic is not merely an economic consequence. It is a physical expansion of dependence on coal that manifests itself structurally: the reliability of the electricity system becomes more critical than climate goals, even when these goals are formally still in place.
ERCOT as a Stress Node
The ERCOT (Electric Reliability Council of Texas) power grid is at the heart of the new infrastructure emergency. The EIA has predicted that rapid demand growth from data centers could increase wholesale prices in the market by 79% by 2027, unless interconnection conditions and flexible generation capacity are modified.
The operating mechanism is an asymmetry between impulsive demand and slow supply. Data centers require immediate power; renewable energy projects, even when funded, take years to be activated due to interconnection procedures regulated by FERC (Federal Energy Regulatory Commission). As a result, the system is forced to rely on thermal sources with immediate response, such as coal-fired power plants, which do not require the activation of the ramp-up process for hours.
This dynamic has already generated a change in the relationship between operators and utilities. PPL Electric Utilities reached a $275 million agreement with large consumers, introducing the LP-6 tariff that imposes long-term obligations (10 years) and penalties for withdrawal. Data centers are no longer customers: they are critical assets that must ensure system stability.
The Strategic Leverage is Time
The key element of control is not power, but the time required to connect to the network. The average five-year delay in interconnecting data centers in the United States has transformed access to the electrical grid into a strategic leverage.
The technical response to this emergency was the proposal of the DATA Act 2026, introduced by Senator Tom Cotton. The law provides for a complete bypass of FERC regulations for data centers that build autonomous power infrastructure (off-grid), exempting these installations from any federal regulatory control. If approved, this solution would allow a data center to be operational in less than eighteen months, without waiting for approvals from the national electrical system.
The consequence is a disruption of the status quo: we move from a centralized generation logic to decentralized supply. Utilities lose control over the production mix; asset managers gain operational autonomy, but increase the risk of regional power grid bottlenecks.
Impact KPI: The Threshold to Monitor
The key indicator for measuring the evolution of the crisis is the percentage of annual emissions attributable to data centers in different electricity markets. The EIA estimates that by 2050, data centers could consume between 22% and 33% of commercial energy in the United States, with an absolute value of 446–818 billion kWh per year.
This is not a future projection. It is already present in its early stages: in 2025, server consumption in data centers represented approximately 7% of total commercial energy in the United States. The shift from 7% to 33% by 2050 is not only an energetic but also a logistical paradigm shift, which shifts the centrality of decisions from climate policies to the response time of the electricity system.
The narrative speaks of accelerated decarbonization; the data shows a structural recovery in dependence on coal. The gap manifests itself in two indicators: the increase in emissions (4%) and the delay in interconnection (5 years). When these values exceed the tolerance thresholds of the system, the green transition will be undermined not by political choices, but by physical constraints.
Photo by Riccardo Annandale on Unsplash
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