Key Highlights

  • The International Energy Agency projects 64% of incremental global power generation through 2035 will come from fossil fuels, driven primarily by artificial intelligence data centre Demand.
  • Coal currently supplies 15% of all data centre electricity globally, with Asian markets showing particularly rapid growth in coal-dependent power infrastructure.
  • US coal stockpiles have fallen to historically constrained levels, holding only 120 days of burn at power plants, creating acute Supply tightness.
  • Rising thermal coal prices are coinciding precisely with utilities' urgent need for baseload capacity to support AI infrastructure expansion and grid stability.
  • The delayed retirement of existing coal plants reflects grid operators' reassessment of long-term capacity requirements in light of data centre clustering and power demand concentration.

The Unexpected Resurrection of Thermal Power

The global energy transition narrative has long portrayed coal as a declining relic, destined for obsolescence as renewables and cleaner technologies advance. Yet the explosive growth of artificial intelligence infrastructure is rewriting this script with stark clarity. According to analysis from the International Energy Agency, the next decade will witness a profound Reversal in energy generation patterns.

Rather than continuing their historical decline, fossil fuels will capture nearly two-thirds of all incremental power generation capacity through 2035, with data centre demand as the primary driver. This finding fundamentally challenges the assumption that the energy sector's trajectory is fixed. The sheer computational intensity required to train and operate large language models and other AI systems demands constant, reliable power, forcing utilities and grid operators to reconsider long-dormant Assets and Investment pathways they had written off as terminal.

Coal's Unexpected Utility in the AI Era

Coal's resurgence is particularly pronounced in Asia, where data centre operators are constructing sprawling campuses that require gigawatts of continuous power. The mineral currently provides 15% of electricity consumed by data centres globally, a figure that understates its regional significance. In countries with existing coal infrastructure, ageing plants that were earmarked for closure are experiencing unexpected reprieves as operators calculate their value for baseload power generation.

Unlike solar or wind installations, which suffer from intermittency challenges, coal-fired generation offers the dispatchable capacity that data centre operators desperately require. This reality has created a peculiar economic incentive: the Economics of data centre power demand now make coal plant life extension commercially viable in ways that would have been unthinkable merely two years ago.

Supply Constraints and Price Pressure

The tightening of US coal stockpiles reveals a critical constraint in this reversal. Power plants currently maintain only 120 days of thermal coal reserves, a historically minimal buffer that reflects years of coal retirements and supply chain restructuring. This supply tightness arrives at precisely the moment when utility operators face peak demand for baseload capacity.

Thermal coal prices have consequently climbed, reflecting both constrained supply and rising demand from an unexpected source. The timing creates a paradox: data centre operators seeking to build out their infrastructure encounter elevated input costs for the fossil fuel generation upon which their expansion depends. Yet price elevation has not dampened demand; rather, the economic logic of AI deployment appears sufficiently compelling that operators accept these elevated costs as the price of securing reliable power.

The Renewable Contradiction

The IEA's projection contains an inherent tension that deserves scrutiny. While fossil fuels will capture 64% of incremental generation, Solar Energy is simultaneously projected to become the largest global power source within the next decade, ultimately surpassing coal and petroleum. This apparent contradiction reflects the sheer scale of incremental capacity required.

The absolute Volume of new coal and gas plants needed to meet data centre demand exceeds the parallel build-out of renewable capacity, even as renewables grow exponentially. Data centre clustering in specific geographic zones creates a spatial problem that renewables alone cannot efficiently solve; centralised coal plants offer the reliability and geographic flexibility that distributed solar struggles to provide. Consequently, the energy sector faces a period in which both fossil fuel expansion and renewable deployment accelerate simultaneously, driven by competing imperatives.

Long-term Implications and Grid Transformation

The IEA's 2035 forecast carries implications that extend well beyond Commodity prices or utility balance sheets. Substantial Capital now flows toward coal plant maintenance, modernisation, and operational extension, diverting resources that might otherwise fund rapid renewable deployment or grid storage innovation. Policymakers confront an uncomfortable reality: the technological revolution that promises to transform human productivity is simultaneously extending the operational life of carbon-intensive infrastructure they have committed to retiring.

This dynamic may alter the trajectory of global decarbonisation efforts, particularly in jurisdictions where coal represents the most cost-effective means of meeting explosive new power demand. The data centre economy is reordering energy priorities in real time, and the market's response suggests coal's obituary may have been written prematurely. How long this reprieve endures will depend on whether battery technology and grid modernisation can ultimately provide the dispatchable capacity that currently makes coal indispensable.