Energy demand is outrunning the clean energy build: what operators need to know in 2026

Renewable energy grew nearly 10% in 2025. Fossil fuel consumption still went up. That is the central operational reality in the Energy Institute's 2026 Statistical Review of World Energy, released in partnership with Ember and in collaboration with KPMG and Kearney, and it carries direct implications for any enterprise team building energy procurement or sustainability strategies around grid decarbonization timelines.

The demand gap that clean investment hasn't closed

Global total energy supply rose from 592.2 exajoules in 2024 to 600.3 exajoules in 2025, an increase of about 8.1 exajoules, according to Forbes contributor Robert Rapier, a chemical engineer who covers the energy sector and analyzed the Statistical Review in detail. Renewables added roughly 3.2 exajoules over that period. That means clean energy covered less than 40% of new demand growth, leaving fossil fuels to fill the rest.

Oil, natural gas, and coal all increased year-over-year. Oil remained the world's largest single energy source at 201.0 exajoules. Natural gas rose to 150.7 exajoules and coal to 166.0 exajoules. Combined, the three fossil fuels supplied approximately 518 exajoules, or roughly 86% of global total energy supply, Rapier reported, citing the Statistical Review.

The percentage shares expose the structural challenge. Nuclear supplied about 5.2% of global energy; hydroelectricity about 2.7%. Renewables, at roughly 5.9%, are growing fast in relative terms but remain a small base in a system measured in hundreds of exajoules.

Capital is accelerating, but so is demand

The investment picture for 2026 is more optimistic. Global energy spending is expected to reach $3.4 trillion this year, up roughly 5% year-over-year, with clean energy technologies projected to attract $2.2 trillion of that total, according to IEA-attributed figures circulating across industry channels. That is a meaningful acceleration of clean capital.

But the 2025 data illustrate why capital alone does not resolve the demand equation. When total energy consumption grows by 8.1 exajoules in a single year, even double-digit percentage growth in renewables falls short in absolute terms. For enterprise energy buyers, that gap is not just a policy problem; it determines grid mix, power purchase agreement pricing, and the reliability calculus for carbon reduction commitments.

What the math means for procurement and sustainability teams

The Statistical Review's data challenge a common planning assumption: that renewable capacity growth is translating quickly into grid decarbonization at scale. As Rapier noted in Forbes, the problem is not that renewables are failing to grow. The problem is that global energy demand is expanding fast enough that clean additions are still largely supplementing, rather than displacing, fossil fuel use.

For a VP of Operations or procurement director managing energy contracts, that distinction matters when setting carbon baseline assumptions, negotiating long-term power agreements, or evaluating on-site generation investments. A grid that is 86% fossil-fueled is still largely a fossil-fueled grid, regardless of the rate at which the margin is changing.

Combined fossil fuel supply rose by about 4.6 exajoules in 2025, accounting for more than half of the total global energy supply increase, per the Forbes analysis of the Statistical Review. That trajectory will need to reverse, not just slow, for enterprise decarbonization targets tied to Scope 2 emissions to reflect real grid progress.

What this means for your team

• Revisit carbon accounting assumptions: if your Scope 2 calculations assume significant grid decarbonization by a near-term year, benchmark them against the Energy Institute's actual grid mix data, not projected trajectories.
• Pressure-test PPA terms: in a market where fossil fuel supply is still growing, renewable energy certificate pricing and power purchase agreement availability may not move as fast as transition narratives suggest.
• Evaluate on-site generation economics: with grid decarbonization slower than many forecasts, the business case for behind-the-meter solar, storage, or CHP may be stronger than a grid-improvement assumption would imply.
• Monitor the $2.2 trillion clean investment figure: if 2026 capital deployment stays on track, watch for the capacity additions that follow in 2027-2028, which will be the real test of whether the demand gap narrows.