What Swiss Energy Surveys Won’t Tell You — The Land Truth Behind Wind, Solar, and Nuclear

In response to: ETH researcher Annalisa Manera on nuclear power and wind energy (Tages-Anzeiger)

ETH nuclear engineer Annalisa Manera deserves credit for calmly stating what much of the Swiss political class seems unwilling to admit: replacing just one nuclear reactor would require around 1,350 wind turbines. Switzerland’s largest wind farm at Mont Croset currently has just 16.

Wind turbines from the JUVENT power plant are pictured on the Mont-Croset in Saint-Imier, Switzerland.

The numbers speak for themselves—and yet they rarely appear in public discourse. The Tages-Anzeiger article does a service by publishing Manera’s views, but the broader framing of the piece still betrays a deep bias. It includes a Swiss survey about energy preferences without once confronting the physical or spatial consequences of those preferences.

Where is the survey question asking Swiss citizens if they support building a 15–16 GW solar farm, covering over 100 square miles of their landscape, just to replace one nuclear plant?

That’s right: 100 square miles, as illustrated above on this map of Switzerland. The result is stark. This is what it takes to match the continuous, firm power of one nuclear facility in a country where solar capacity factors average around 9%. Yet respondents are never shown this visual or asked whether they are willing to sacrifice that kind of land footprint—nor are they told that the same energy could be produced with a few square miles of existing nuclear infrastructure.

This is how public opinion is shaped—not through facts, but through carefully crafted omissions. People are asked which energy sources they “prefer,” and unsurprisingly, many choose wind or solar. They’ve been told these are the cleanest, greenest, most modern options. But they’re not told how much land these sources require. How much mining. How many backup systems. How many megatons of concrete, glass, copper, lithium, and steel. Nor are they told about the redundancy, the intermittency, the curtailment.

Wind and solar are not on-demand sources—they fluctuate with weather and time of day. Without firm, always-available baseload power to stabilize the grid, their variability must be compensated by fast-ramping backup systems. And when that backup isn’t nuclear, it’s almost always fossil fuels. Germany provides the clearest example: after shutting down most of its nuclear plants, it turned back to burning lignite—Europe’s dirtiest coal—adding tens of millions of tons of CO₂ to the atmosphere each year. That pollution doesn’t respect borders. It drifts across to Switzerland, dimming the same Alpine skies the country prides itself on preserving. In rejecting nuclear, Germany didn’t eliminate risk—it outsourced it.

Meanwhile, Swiss citizens are rarely told that solar panels in their country, even under optimal conditions, deliver less than 10% of their rated output averaged over time. And they’re never asked whether they understand that these so-called “green” technologies simply cannot power a stable, industrial society without either nuclear energy—or storage infrastructure so massive and implausible it borders on science fiction.

That’s why Earthrise Accord calls this the renewables-only trap: a political and ideological framing that makes it easy to be anti-nuclear because it never forces anyone to visualize the actual cost of eliminating it.

We’re not anti-renewables. We’re anti-denial.

We support wind and solar where they make sense—on rooftops, brownfields, industrial zones, and in places like Nevada, where abundant sun and open desert make high-capacity solar a practical contributor. But what works in Nevada does not work in northern or mountainous Europe, where sunlight is limited, land is scarce, and capacity factors are low. Pretending otherwise turns energy policy into performance art. We will not let symbolic preferences masquerade as strategy. If we want a livable planet, we must embrace nuclear realism. That means showing people what it actually takes to replace nuclear—on a map, in megawatts, and in square miles.

The Netherlands offers a particularly revealing case. This is a country that reclaimed much of its territory from the sea through centuries of engineering genius and sacrifice. It should not now surrender that hard-won land to the sprawling demands of a renewables-only trap. Yet many Dutch climate policy academics—including leading voices at TU Delft and PBL—continue to push land- and sea-intensive solutions like zon op land and massive offshore wind buildouts, while deliberately sidelining nuclear. These proposals consume vast amounts of space, rely on fragile global supply chains, and require fossil backup to cover for intermittency. What’s sold as green progress is, in truth, a strategy of ecological sprawl and strategic dependency.

This isn’t climate leadership. It’s climate theater—performance dressed as policy.

Until we confront these spatial and systemic tradeoffs honestly, surveys like the one cited in Tages-Anzeiger will remain little more than well-intentioned propaganda, calibrated to elicit feel-good answers rather than informed ones.

It’s time to bring land—and truth—back into the conversation.