Hydrogen is the universe’s oldest and most abundant element. The clean energy discussion has centered on “green hydrogen”—manufacturing it using renewable electricity.
But what if the earth itself held vast, untapped reserves of pure, naturally occurring hydrogen, ready for us to tap into?
In this week’s podcast I speak to Emmanuel Masini, known as Manu, a geologist and the CEO of Mantle8, a company at the forefront of exploring this game-changing resource. The company is backed by Bill Gates’ Breakthrough Energy Ventures and Kiko Ventures.
We discuss how natural hydrogen is formed in the earth’s crust, and what conditions need to exist to find pure natural hydrogen.
Manu explains what he calls the “geological trifecta” that is needed for economic natural hydrogen extraction.
Extraction of natural hydrogen could overcome the cost barriers of green hydrogen production, which remains much higher than hydrogen produced from fossil fuels.
Mantle8 is targeting a production cost of less than one euro per kilogram, compared to between 5 to 7 euros for green hydrogen produced from renewable sources of electricity.
Currently the only producing natural hydrogen well is in Mali, but it only produces around 5 tonnes a year.
China has introduced new export license rules for advanced lithium iron phosphate (LFP) battery materials—potentially restricting global EV and clean energy supply chains.
In this episode, I speak with Dan Blondal, CEO of Nano One Materials, one of the few companies outside China developing LFP technology.
We discuss what the new rules mean for the market, China’s head start in high-density LFP, and how innovation like Nano One’s “one-pot process” could make North American production more competitive.
In a world buzzing with talk of AI and data centers, nuclear power is back in the spotlight.
But behind the headlines lies a complex and often overlooked market: uranium. In this episode, I speak with Nick Clarke, founder of Curzon Resources — one of the world’s largest uranium traders — about how the market is evolving as nuclear power returns to the global stage.
Clarke explains why he expects the uranium market to double in size over the next decade, how China is outpacing the West in securing supply, and why uranium prices have dipped despite soaring demand.
As the world races to power the next generation of AI and industry, uranium is re-emerging as a strategic resource. Yet as Nick Clarke warns, the West risks being left behind unless it rebuilds its nuclear supply chains.
Please follow my newsletter Volt Rush on Substack for weekly updates on clean energy, critical minerals, and China.
Home charging has transformed the economics of owning an electric vehicle in the UK.
With smart overnight tariffs, it can cost as little as £6 ($8) to fully charge your EV at home — compared to more than £20 at a public charger.
The next frontier is even more exciting: using your car’s battery not just for driving, but to power your home during peak hours and even support the wider electricity grid. This is the promise of Vehicle-to-Grid (V2G) technology.
In this episode, I speak with Peter McDonald, Mobility Director at charging company Ohme.
With two decades of experience at companies like Nissan and Volkswagen, Peter shares why the UK’s unique energy market makes home charging so much cheaper, and why the country could become a leading testbed for V2G as volatile power prices create new opportunities.
How do we reconcile the need to move away from fossil fuels with the need for new mines to build clean energy technologies?
Thea Riofrancos, Associate Professor of Political Science at Providence College, explores this dilemma in her new book Extraction: The Frontiers of Green Capitalism.
The book focuses on lithium — the metal at the heart of batteries for electric vehicles. Traveling through Chile, Nevada, and Portugal, Riofrancos meets with activists and residents to investigate what she calls “green extractivism.”
She argues that these “extractive frontiers” form the material foundation of a zero-carbon world. But they also warn us against “the temptations of technical fixes, escape-from-nature fantasies, or a purely post-extractive society.”
Riofrancos shows how proposed and existing lithium mines create conflicts with local communities and threaten cultural and historical roots. As she writes: “The energy transition is not a peaceful bridge between fossil fuels and renewable energy, but a crucible where past, present, and possible futures collide.”
These conflicts raise fundamental questions about justice in the energy transition and risk splitting the environmental movement. “Ultimately, anti-extractive activists are forcing us to address an uncomfortable, but necessary question: What does it mean to defend people and the planet from extraction — when others frame this same extraction as necessary to save people and the planet?”
She also points to a potential solution: fixing demand. Do we really need to electrify oversized vehicles like Hummers, or can we drive smaller cars and invest in public transport? After all, future mining depends on how much we choose to consume.
In our conversation, we explored these tensions — and what they mean for the future of the energy transition.
Why did it take more than 60 years for solar to go mainstream—and how did it get so cheap?
In this episode, I explore the global history of solar energy with Gregory Nemet, professor at the University of Wisconsin–Madison and author of How Solar Energy Became Cheap.
Greg reveals how solar’s stunning price drop—from over $100 per watt in the 1970s to under 10 cents today—wasn’t driven by a single breakthrough or country. Instead, it was a global relay race of innovation, policy, and persistence.
🔍 What we cover:
Why it took decades for the world to install its first terawatt of solar capacity
The forgotten roles of the U.S., Japan, and Germany before China took the lead
How global cooperation, not just competition, drove down solar costs
Why solar could become the world’s largest electricity source by the 2030s
The risks and opportunities in a more fragmented energy future
🎧 Tune in to hear the surprising, multi-decade journey behind one of the greatest climate success stories—and what it means for the future of clean energy.
Links:
Gregory Nemet’s website: gregnemet.net
In this episode, I speak with David Abraham, author of The Elements of Power, about the enduring vulnerabilities in Western supply chains for rare earth elements and magnets, which are used in electric vehicles and wind turbines. Nearly a decade after his book warned of the consequences of China’s control over these resources, Abraham reflects on how little has changed — and why.
We explore how China’s state-led strategy outmaneuvered market-driven Western approaches, why Japan doubled down on China even after a supply shock, and what lessons the U.S. and Europe must learn if they hope to build resilient supply chains.
From the US policy during the Second World War to today’s EV and clean tech ambitions, this conversation unpacks the economic, geopolitical, and industrial stakes of the rare earth race.
SOURCES:
In the 1930s, fewer than 10% of U.S. farms had electricity. One solution? Small wind turbines.
My guest, Brandon Owens—author of The Wind Power Story—explores how wind power brought electricity to rural America long before the grid. We dive into the story of the Jacobs Wind Electricity Company, which delivered over 30,000 turbines to farms across the country. Known as the “Cadillac of the trade,” one even powered a station at the South Pole.
We also discuss how federal policy, like the 1937 Rural Electrification Act, helped end this early era of decentralized, off-grid power.
SOURCES: The Wind Power Story: A Century of Innovation that Reshaped the Global Energy Landscape by Brandon N. Owens.
This week we are talking about the life of George Cove, a Canadian inventor and entrepreneur.
Born in Nova Scotia in 1863 or 1864, Cove presented his first “solar electric generator” in 1905 in the Metropole Building in Halifax, Nova Scotia.
He then moved to the US to continue work on his solar device. In 1909 he exhibited four solar panels on a New York rooftop, which were used to charge lead-acid batteries.
This was decades before the first conventional photovoltaic solar panel as we know it today was invented at Bell Labs.
Cove intended to use the heat of the sun to generate electricity, a so-called thermoelectric generator. But he may have accidentally created a solar panel that generated electricity via the photovoltaic effect - similar to current panels we have today.
In October of the same year Cove was kidnapped. Some reports say his life was threatened if he did not cease work on solar power. Afterwards his company, Sun Electric Generator Company, collapsed.
I’m delighted to be joined by Dr. Sugandha Srivastav. She is a Lecturer in Environmental Economics and a Senior Research Associate at the University of Oxford.
In 2023 she published a fascinating paper on George Cove which argued that solar powercould have become cheaper than coal at least a decade earlier than it did, if Cove’s business had succeeded.
She argues that in the early 1900s people were remarkably positive about solar power and its potential, yet that attitude then disappeared for decades.
How to Build a Low-tech Solar Panel?
Untangling the Mystery of the World’s First Rooftop Solar Panel
Denmark is a global leader in wind energy, with Danish company Vestas standing as one of the world’s largest producers of wind turbines. Wind power accounts for around 58% of Denmark’s electricity—the highest share among OECD countries, according to Ember.
But how did Denmark rise to this level of dominance? The roots of the country's wind power success can be traced back to history, specifically to Poul la Cour, the man who built Denmark's first wind turbine to generate electricity in 1891.
In this episode, Jytte Thorndahl, former curator at the Danish Museum of Energy, delves into the life and groundbreaking contributions of Poul la Cour to Denmark's wind energy development.
At the time la Cour was working, Denmark’s first power stations were being built, but they did not reach rural areas. Additionally, Denmark had to import fossil fuels. La Cour wanted the rural population to benefit from electricity. “The plan was to ease farm labor, make it more efficient, and provide light for reading and working during the long, dark winter evenings,” according to the Poul la Cour Museum.
La Cour’s pioneering work laid the foundation for Denmark’s modern wind industry. Unlike Charles Brush, whom we discussed in our previous episode, la Cour didn’t just innovate—he shared his knowledge.
In 1903, he founded the Danish Wind Electricity Society, which trained rural electricians in three-month courses in Askov. These courses covered not only how to install wind turbines but also subjects like accounting, physics, and geometry.
By the early 1900s, Denmark’s wind power industry was taking off. By 1908, the year la Cour passed away, Danish company Lykkegaard had built seventy-two wind turbines based on his designs, supplying power to rural Denmark. By early 1906, forty windmills were already generating electricity across the country.
SOURCES: Link to the Poul la Cour Museum
In 1888, a tall wind turbine in the backyard of a grand mansion on Cleveland's Euclid Avenue caught the attention of many. To most passers-by, it seemed like an unusual curiosity—perhaps the toy of a wealthy man.
But this was no ordinary decoration. It was the pioneering work of Charles Brush, one of the first people to harness wind power for generating electricity.
Brush's wind turbine had 144 wooden blades which were mounted on a sixty-foot tall tower. He stored the electricity in twelve batteries in his basement.
Yet Brush, a businessman, never patented the wind turbine, nor did he seek to start a company to manufacture the device.
In this episode, we dive into Brush's invention and its significance. My guest today is Paul Gipe, a wind power advocate for over four decades.
Paul is the author of several influential books on the wind industry, including Wind Energy for the Rest of Us and Wind Energy Comes of Age. He also runs an excellent website full of information on the wind industry.
Join us as we explore the history of wind power and its evolution with one of the leading experts in the field.
BOOKS MENTIONED:
Wind Energy in America, by Robert Righter.