Wind Turbines

Energy

Wind Turbines

Onshore wind is now the cheapest electricity available to the human species. Not the cheapest clean electricity. The cheapest electricity.

🌱Seasons

The effect compounds within years. Put it in place and it keeps working.

Origins

The wind has been doing our work for a very long time, and then, briefly, we forgot about it.

Persian vertical-axis mills were grinding grain in the seventh century. The Dutch drained a country with windmills and built a nation on land that had been sea. By the nineteenth century the American plains were dotted with windpumps lifting water for cattle, and small wind chargers were putting electric light into farmhouses long before the grid arrived.

Then coal and oil became cheap enough that nobody could be bothered, and the wind was left to the past.

Its return began, unromantically, with the oil shock of 1973 and was carried by an odd coalition: Danish policy, Californian tax credits, and German engineering stubbornness. For decades wind was a boutique technology that required a subsidy and an apology.

And then, quietly, something extraordinary happened. Turbines got bigger — a modern blade is longer than a football pitch — and every doubling of installed capacity brought the cost down, and the learning curve kept going, and nobody in the fossil industry took it seriously until it was too late.

In 2024, the global weighted-average cost of new onshore wind was US$0.034 per kilowatt-hour. It is the cheapest source of new electricity on Earth. Not the cheapest renewable. The cheapest, full stop. The argument is over, and a great many people have not noticed.

What it actually is

A wind turbine converts the kinetic energy of moving air into electricity, and the physics that governs it explains almost everything about the industry.

Power available from wind scales with the cube of wind speed. Double the wind speed and you get eight times the power. This is why siting is everything, why turbines have grown so tall — wind is faster and steadier higher up — and why a mediocre site is not worth developing at any price.

Power also scales with the square of the rotor diameter: sweep four times the area, get four times the power. This is why blades keep getting longer, and why the machines look so absurd up close. They are absurd. They are also the reason the price collapsed.

The intermittency is real and it is the honest problem. The wind does not blow on demand, and a grid must match supply to demand every second. This is where the other Energy solutions come in — storage, grid flexibility, transmission, demand response — and it is why the future is not “wind” but a system: wind and solar and storage and a smarter grid, each covering for the others.

The good news is that wind and solar are anti-correlated in most places. Wind blows harder at night and in winter. Solar peaks at midday and in summer. They are not competitors; they are partners, and a grid with both needs far less storage than a grid with either.

The numbers

The price, which is the whole story. Global weighted-average LCOE for new onshore wind in 2024: US$0.034/kWh — the cheapest source of new electricity in the world (IRENA, 2025). Onshore wind is around 53% cheaper than the cheapest fossil alternative.

The collapse. Onshore wind costs fell roughly 69% between 2010 and 2024. Total installed cost is now around US$1,041/kW.

The competition is over. In 2024, 91% of all newly commissioned utility-scale renewable capacity delivered power more cheaply than the cheapest new fossil alternative. Renewables avoided an estimated US$467 billion in fossil fuel costs that year alone.

The build rate. Global renewable capacity additions hit a record 582 GW in 2024, up nearly 20% year on year.

Offshore is different, and dearer. Offshore wind runs around US$2,852/kW installed — far more expensive, but with stronger, steadier wind and no neighbours to object. It is a different business with different economics and should not be conflated with onshore.

The bottleneck is no longer cost. IRENA is explicit: costs are likely to stay higher in Europe and North America because of permitting delays, limited grid capacity and balance-of-system expenses — not because of the turbines. We have solved the engineering. We have not solved the paperwork.

Why it matters

The wind has been free for the entire history of the world and we have just worked out how to use it properly, and it turns out to be cheaper than digging up the remains of dead swamps and setting fire to them.

That sentence should be the end of the argument, and it is not, and it is worth asking why.

Part of it is that the objections are aesthetic, and aesthetic objections are real and should not be sneered at. People do not want a turbine on their ridge. They think it spoils the view, and they are entitled to think that, and the environmental movement’s habit of dismissing them as backward has cost it enormously.

But there is a deeper thing worth saying to anyone who loves a landscape, which is most of the people who object.

That coal-fired plant does not appear in the view either, because it is somewhere else, and neither does the mine, and neither does the mountain that was removed to reach the seam, and neither does the acid in the stream, and neither does the child with asthma. The cost was always being paid; it was simply being paid somewhere you could not see. A wind turbine is the first form of power generation in history that shows you its entire cost, standing in the open, where you can look at it.

You may still not want it on your hill. That is a legitimate view. But it is not a choice between a turbine and an untouched landscape. It is a choice between a turbine and a landscape somewhere else, and somebody else’s lungs.

What it actually takes

Permitting, which is now the actual barrier. The technology is solved and cheap. In much of Europe and North America a wind farm can wait the better part of a decade for consent, and that delay, not the cost of steel, is what is slowing the transition. This is a political and administrative failure, not an engineering one.

Grid, grid, grid. The wind blows where people do not live. Getting the electricity from there to here requires transmission lines, and transmission lines are harder to permit than the turbines. Enormous quantities of built wind capacity are being curtailed — switched off — because the wires do not exist.

Taking the objections seriously. Noise, shadow flicker, visual impact, and bird and bat mortality are all real, all measurable, and all substantially mitigable through siting, curtailment during migration, and paint. The industry has often been dismissive and it has paid for that.

Community ownership, which changes everything. Denmark and Germany built a great deal of wind partly because local people owned shares in it. A turbine you own is a very different object from a turbine that a distant company put on your ridge. This is the single most underused tool in the field.

And the honest ecological cost. Turbines kill birds and bats. Far fewer than cats, buildings or climate change itself, and this is well established — but it is not zero, and siting away from migration corridors and raptor territory matters, and pretending otherwise makes conservationists into adversaries when they should be allies.

Where it matters most

The Great Plains is the largest wind resource in the world and the reason Texas and Iowa generate a remarkable share of their power from it. The wind is enormous and the grid is not.

The North Sea is the offshore heartland: shallow, windy, and next to the largest electricity markets in Europe. It is also an ecologically sensitive marine area, and doing this well means doing it carefully.

The Scottish Highlands and Irish coast have some of the best onshore wind in the world — and are also peatland, which means a badly sited turbine can release more carbon from disturbed peat than it will ever save. This is a genuine conflict and it is resolved by siting, not by slogans.

The Patagonian steppe has some of the most consistent wind on the planet and almost no one to use it.

The East African Rift — Lake Turkana and the Rift wind corridors — is where wind can leapfrog fossil infrastructure entirely, and where the grid to carry it does not yet exist.

How to tell it’s being done well

Where is it sited? On peat, a badly placed turbine can emit more from the disturbed ground than it saves. Migration corridors and raptor territory matter. Siting is the whole ecological question.

Who owns it? Community-owned wind is accepted, defended and expanded. Absentee-owned wind is litigated. This is the most reliable predictor of whether a project survives its own planning process.

Is there a wire? Wind with no transmission is wind that gets curtailed. Ask whether the grid connection exists or is merely hoped for.

Are they honest about bats? Bat mortality is real and largely fixable by curtailing at low wind speeds during migration, at a small cost in generation. Operators who do this are serious. Operators who deny the issue are not.

What you can do

Anyone

  • Onshore wind is now the cheapest electricity on Earth. This is recent, it is verified by IRENA, and a great many people arguing about energy do not know it.
  • If a wind farm is proposed near you, ask whether the community can own a share of it. It changes the project and it changes the politics.

Communities

  • Community ownership is the single most underused tool in wind. Denmark and Germany built their industries on it, and the local objections largely evaporate when local people own the asset.
  • Objections about siting, noise and birds are legitimate and mostly addressable. Insist they be addressed rather than dismissed.

Policymakers

  • Permitting is now the binding constraint, not cost. Wind farms wait years for consent while the climate does not.
  • Build the transmission. Enormous quantities of built wind are curtailed because the wires do not exist, and transmission is harder to permit than the turbines.
  • Protect peatland from badly sited turbines. On peat, a turbine can be carbon-negative in the wrong direction.

Business and investors

  • The economics no longer need arguing. The bottlenecks are grid connection queues and permitting, and that is where the money and the lobbying should go.
  • Community co-ownership models substantially de-risk projects politically, and almost nobody uses them.

Who is working on this

We are researching which organizations in our directory of 8,493 actively work on this solution, and we only list an organization once we have verified it. That research is ongoing. In the meantime, search the directory yourself:

Search the directory for “Wind Turbines” →

Questions

Is wind actually cheaper than fossil fuels now?

Yes, and it is not close. IRENA's 2025 report put the global weighted-average cost of new onshore wind at US$0.034 per kilowatt-hour in 2024, making it the cheapest source of new electricity in the world, around 53% below the cheapest fossil alternative. In 2024, 91% of all newly commissioned utility-scale renewable capacity was cheaper than any new fossil plant.

What about intermittency?

It is the real problem and it is a system problem, not a wind problem. Grids need storage, flexibility, transmission and demand response. Helpfully, wind and solar are anti-correlated in most places: wind blows harder at night and in winter, solar peaks at midday and in summer. A grid with both needs far less storage than a grid with either.

Why are turbines so enormous?

Because of physics. Power scales with the cube of wind speed, and wind is faster and steadier higher up, so height pays. Power also scales with the square of rotor diameter, so longer blades pay. The machines look absurd because the economics rewarded absurdity, and that is why the price collapsed.

Do wind turbines kill birds?

Yes, and it is worth being honest about it. The numbers are far below those killed by cats, buildings, or climate change itself, but they are not zero. Siting away from migration corridors and raptor territory matters, and bat mortality can be substantially reduced by curtailing turbines at low wind speeds during migration, at a small cost in generation.

What is actually holding wind back now?

Not cost. IRENA is explicit that higher costs in Europe and North America come from permitting delays, limited grid capacity and balance-of-system expenses. The engineering is solved. The paperwork is not, and enormous quantities of built capacity are curtailed because transmission lines do not exist.

What about the view?

It is a legitimate objection and dismissing it has cost the environmental movement dearly. But it is worth noticing that a coal plant does not appear in the view either, and neither does the mine, the removed mountain, the acid stream or the child with asthma. A wind turbine is the first form of power generation that shows you its entire cost, standing in the open.

Sources

The solution taxonomy follows the framework popularised by Project Drawdown. The analysis above is our own; for their carbon modeling and rankings, visit them directly.