Despite nuclear power’s unmatched ability to produce reliable, carbon-free energy at scale, it is often dismissed by clean energy advocates in favor of renewable resources like wind and solar. Cost arguments and public misconceptions around safety and radioactive waste have kept it out of many mainstream climate strategies. But as Tim Gregory argues in his new book Going Nuclear: How Atomic Energy Will Save the World, this exclusion may be the greatest obstacle to achieving net zero goals. In fact, Gregory says in his book “net zero is impossible without nuclear power.”

“Claiming renewables on their own are enough to replace fossil fuels is underestimating the challenge of achieving net zero,” Gregory said as a guest on The POWER Podcast. “Fossil fuels have basically defined the world order for the last couple of centuries, and to think that we can replace them with wind power and solar power, which are fundamentally tied to the whims of the weather, and the rotation of the planet in the case of solar, is really underestimating the scale of the challenge,” he said.

“We need power that comes in enormous quantities exactly where we need it and when we need it,” Gregory continued. “I don’t want to live in a world without solar panels or wind turbines, but to think that they can do it on their own, I think, is honestly naive. We need something that’s reliable to compensate for the intermittence of renewables, and nuclear power would be absolutely perfect for that.”

Notably, innovative companies and many government leaders around the world are backing nuclear power projects. “Big tech in North America has really cottoned on to these small modular reactors,” said Gregory. “Meta, Google, Microsoft, and Amazon are all going to be using small modular reactors to power their data centers. … This isn’t just a pipe dream—this is actually happening now in real time. … It’s been very, very encouraging watching that unfold.”

Public perceptions on nuclear power are also trending in a positive direction, and the movement seems to be bipartisan. “It’s very, very encouraging that more than half of people in the UK either strongly support or tend to support nuclear power. Strong opposition to nuclear power, according to the latest poll, is actually below 10%,” Gregory reported. “As such, the two major political parties in the UK—that’s the Labor Party, which is kind of our left leaning party, and the Conservative Party, which is our right leaning party—they both support the massive expansion of nuclear power, which is really, really nice actually. It’s maybe something that both sides of the political spectrum can agree on.”

The same is true in the U.S., where both Democrats and Republicans have gotten behind nuclear power. A case in point is the Accelerating Deployment of Versatile, Advanced Nuclear for Clean Energy (ADVANCE) Act, which was signed into law in July 2024. It passed with overwhelming bipartisan support in the Senate with a vote of 88–2, and in the House of Representatives with a vote of 393–13.

“If your politics has you more concerned with environmental stewardship, and climate change, and phasing out fossil fuels, and getting rid of oil from the energy system, then nuclear power is for you. But then at the same time, if your politics has you perhaps more leaning towards economic growth, and the economy, and prosperity, and all that kind of thing, then nuclear power is for you as well, because it provides the energy that enables that economic growth,” Gregory said. “And so, it’s actually very, very encouraging to see that, at least in most countries, nuclear power is not a partisan issue, which is all too rare in the world these days.”