For the first time, clean energy absorbed every unit of new electricity demand on earth. The question is no longer whether the transition is happening — it is how fast.
The numbers that arrived this week from energy researchers confirmed something that would have seemed improbable a decade ago: in 2025, renewable energy — primarily solar and wind — generated enough new electricity to absorb the entire increase in global demand. Fossil fuels, for the first time, were not needed to power the world’s growth. They were needed only to sustain what already existed.
Renewable energy met all global electricity demand growth in 2025, with solar generation surging by nearly a third; solar met 75% of the rise in demand, while wind supplied most of the remaining increase; renewables now produce 34% of global electricity.
That 34% figure represents a structural shift, not a seasonal anomaly. Renewables are not outperforming fossil fuels during a favorable quarter or in a particular region — they are now the dominant source of new electricity generation across the world. According to the analysis from Ember, the energy think tank whose data underpins this assessment, for the first time, wind and solar supplied more power than coal worldwide, while plug-in electric vehicles accounted for more than a quarter of new car sales globally.
The Solar Acceleration Nobody Predicted
The scale of solar’s growth is the defining energy story of the decade, and it continues to surprise even the researchers who track it. In 2004, it took the world a full year to install one gigawatt of solar power capacity. Today, twice that amount goes online each day.
That is not incremental improvement. That is a change in the fundamental economics and logistics of energy deployment — one that has made solar the fastest-growing energy technology in the history of human civilization. The speed of change has consistently outpaced the models used by international bodies to forecast it, and there is no sign that the trajectory is flattening.
What drove the acceleration? Cost, primarily. Wind and solar are cheaper than coal and natural gas, and increasingly, they are boosted by ever more affordable batteries, which have gotten 90% cheaper over the last decade. “Solar is no longer just cheap daytime electricity,” said Kostantsa Rangelova, analyst at Ember. “Solar is now anytime dispatchable electricity.”
That last point is critical. One of the most persistent arguments against renewables as a reliable base for modern electricity grids was intermittency — the fact that solar only generates during daylight hours and wind is unpredictable. Battery storage has begun to erode that objection in real terms. As storage capacity grows and costs fall, the ability to dispatch solar-generated electricity at any hour of the day transforms the economics of the entire system.
The Iran War and the Self-Interest Accelerant
The 2025 data was compiled before the current Iran war reshaped global energy markets, but the geopolitical backdrop of 2026 has given the renewable transition a new and unexpected accelerant: self-preservation.
The closure of the Strait of Hormuz — through which approximately 20% of the world’s seaborne oil trade had flowed before the conflict — triggered a supply shock that pushed energy prices to levels not seen since 2022. Gasoline in the United States hit $4.30 per gallon by April 30; diesel in California reached $7.50. In Europe, Dutch gas benchmarks nearly doubled. Airlines rerouted flights. Governments issued emergency energy guidance.
In that context, the appeal of energy that cannot be blockaded, embargoed, or disrupted by a geopolitical conflict is not philosophical — it is practical. European governments that had spoken abstractly about energy security for years are now accelerating investment in wind and solar with the urgency of nations that experienced what a supply shock actually feels like. The same dynamic is playing out across Asia, where countries that had been content to manage their fossil fuel dependency are now treating renewable deployment as a national security question.
Back then renewables had an aura of virtue: buyers paid a premium over fossil energy because of climate concerns. Now, the real driver is self-interest: lower cost and greater energy security. That change in motivation may be the most important breakthrough of all, ensuring that this year’s inflection points are just the beginning.
This shift in motivation matters enormously for the pace of the transition. Policy frameworks and international climate commitments move slowly. Markets responding to price signals and security concerns move fast. The Iran conflict has effectively compressed years of energy security reckoning into months.
What the Data Does Not Show
The 2025 milestone is genuinely historic, but researchers are careful not to misread it. The world is reaching such milestones despite a lurch toward fossil fuels in the U.S., where the Trump administration has slashed federal support for clean energy. While investment in clean energy has reached new highs worldwide, the U.S. is seeing a decline.
Global carbon emissions, while no longer growing at the pace they once were, have not declined. The coal that renewables displaced in electricity generation is being partially compensated for by growing fossil fuel use in transportation, industry, and heating — sectors where electrification is progressing more slowly than in power generation. And the countries that produce the most emissions are not always the countries moving fastest on renewables.
The structural gap between the progress being made and the progress required to meet internationally agreed climate targets remains significant. A recent report found the world is now headed for around 2.8 degrees Celsius of warming by the end of this century, far less than the 3.7 to 4.8 degrees that was forecast before the 2015 Paris Agreement. That is meaningful improvement — but it is not the 1.5-degree limit that climate scientists identify as the threshold below which the most catastrophic consequences of warming can be avoided.
The Direction of Travel Is Settled
What 2025’s data establishes — more clearly than any previous year — is that the direction of global energy is no longer genuinely contested. The debate has shifted from whether renewable energy can power the world to how quickly the transition can be completed and what the political, economic, and industrial disruptions along the way will look like.
The U.S. is on track to add 86 gigawatts of new utility-scale capacity in 2026, which would surpass the previous single-year record of 53 gigawatts added in 2025; 93% of that capacity is projected to come from solar, storage, and wind power.
In March 2026, U.S. renewable electricity exceeded natural gas generation for the first full calendar month in American history — a milestone reached not through policy mandate but through market economics. The infrastructure built over the past decade is now large enough to shift the balance, even during periods of political hostility to the transition.
The energy crisis triggered by the Iran war will eventually resolve. Shipping through the Strait of Hormuz will resume. Oil prices will stabilize. But the memory of what a closed strait does to energy markets will not resolve with it. The case for energy independence — the kind that comes from the sun and the wind rather than from supply chains that run through geopolitical chokepoints — has never been more viscerally understood by governments, businesses, and consumers than it is right now.
That understanding is the most durable accelerant renewable energy has ever had.
