There’s a new player in the clean energy game, and it’s been hiding right beneath our feet.
White hydrogen, which is naturally found deep underground, is causing a buzz among scientists and energy firms. This stuff forms naturally when water is exposed to rocks rich in iron and does not need to be produced through the costly electrolysis process currently required for green hydrogen. There is no need for factories to produce this type of hydrogen.
The numbers are staggering. According to a 2024 U.S. Geological Survey study, Earth’s subsurface stores between 1 billion and 10 trillion tonnes of hydrogen. If even a fraction proves accessible, it could reshape the entire clean energy landscape.
Why the excitement?
Cost, mainly. Green hydrogen currently ranges from $6 to $12 per kilogram—a price tag that makes investors nervous. White hydrogen? The price of white hydrogen could be as low as $1 per kilogram, provided that reserves align with the population’s actual energy needs.
France stumbled onto something big recently. Scientists poking around abandoned mines in the Lorraine region found deposits worth an estimated $92 billion. A company called Mantle8 plans to start drilling in southwest France by 2028, using fancy 4D imaging tech to map underground reservoirs.
Oklahoma researchers are also getting in on the action with a modest $25,000 study running through mid-2026.
The catch?
Nobody’s really figured out how to extract this stuff at scale yet. The only working white hydrogen operation sits in Mali, powering a single village.
“My dream is that this natural hydrogen can play a role, maybe as oil played in the past,” says French geochemist Eric Gaucher.
But he’s quick to temper expectations—there’s still too much we don’t know.
The competition is underway. It remains uncertain whether white hydrogen will become the next energy revolution or simply another promising idea that fades away.
