A Texas energy company is breaking ground on what may be the most ambitious green hydrogen project ever attempted. Green Hydrogen International is developing Hydrogen City in the Coastal Bend region — a facility that will eventually use 60 gigawatts of solar and wind energy to produce more than 2.5 billion kilograms of green hydrogen per year, storing it underground before sending it out to fuel cleaner industries across the region and beyond.
At a glance
- Green hydrogen production: At full build-out, Hydrogen City will generate over 2.5 billion kilograms of green hydrogen annually — enough to replace vast quantities of fossil-fuel-derived hydrogen used in industrial processes today.
- Underground energy storage: The project uses salt caverns at the Piedras Pintas salt dome to store up to 6 terawatt-hours of energy, giving the facility a buffer that smooths out the natural variability of solar and wind generation.
- Phased construction timeline: Phase one comes online in 2026 C.E., delivering 2 gigawatts of green energy capacity and two storage caverns — with more than 50 caverns possible at the site over time.
Why salt caverns change the math
One of the hardest problems in renewable energy is continuity. The sun doesn’t always shine. The wind doesn’t always blow. Hydrogen City’s design addresses this directly.
By pairing solar and wind-powered electrolyzers with massive underground salt cavern storage, the facility can produce hydrogen whenever conditions favor it — and release it steadily regardless of weather. The Piedras Pintas salt dome, a geological formation in South Texas, is well suited to this: salt caverns are already used to store natural gas at scale, and they’re among the few structures that can hold hydrogen under the pressures needed for bulk storage.
GHI also has access to the ERCOT grid, Texas’s main electricity network, giving it a secondary source of renewable power to maintain delivery schedules. The combination of on-site storage and grid access makes Hydrogen City more resilient than projects that rely on generation alone.
Where the hydrogen goes
Green hydrogen doesn’t stay in Hydrogen City. Pipelines will carry it to Corpus Christi and Brownsville, two Gulf Coast ports with existing industrial infrastructure. There it will be converted into green ammonia — a cleaner fertilizer feedstock — and sustainable aviation fuel, which airlines increasingly need to meet emissions targets.
GHI is also exploring direct pipeline connections to industrial customers, export agreements with Japan and Korea, and the potential for a green methane-based rocket fuel to serve the growing commercial launch industry around South Texas — a region that already hosts SpaceX’s Starbase facility near Boca Chica.
How green is green hydrogen?
Green hydrogen earns its label by using electricity from renewable sources to split water through electrolysis — producing hydrogen and oxygen with no direct carbon emissions. This sets it apart from the gray hydrogen that dominates today’s market, which is made from natural gas and generates significant CO₂ as a byproduct.
Scaling green hydrogen production is widely seen as one of the more promising paths for decarbonizing industries that can’t easily run on batteries: steel, shipping, heavy manufacturing, and aviation chief among them. The International Renewable Energy Agency has identified green hydrogen as essential to meeting global climate targets by mid-century.
That said, the economics of green hydrogen remain challenging. It currently costs more to produce than fossil-derived hydrogen, and infrastructure for transport and storage is still being built out. Projects like Hydrogen City are betting that scale will bring costs down — but the transition won’t happen overnight, and the hydrogen will need buyers willing to pay a premium while the market matures. The U.S. Department of Energy’s Hydrogen Shot initiative aims to reduce the cost of clean hydrogen to $1 per kilogram by 2031 C.E., which would help close that gap significantly.
A region finding a new identity
South Texas has long been oil and gas country. The Coastal Bend’s economy has tracked the energy industry’s booms and busts for generations. Projects like Hydrogen City represent a genuine bet that the region’s geography — its sun, its wind, its geology — positions it for a different kind of energy future.
GHI’s plan is one of several large-scale clean energy investments taking root along the Gulf Coast, part of a broader industrial shift that advocates say could create durable jobs in communities that have seen fossil fuel employment shrink. Whether that promise fully materializes depends on federal policy, international demand, and the pace of cost reduction — all of which remain in flux. But the ambition on display here is real, and the first phase arriving in 2026 C.E. will be an early test of whether it can deliver.
For a sense of how rapidly clean energy capacity is growing worldwide, the global renewables milestone covered elsewhere in this archive offers useful context. Hydrogen City is one piece of that larger picture.
Read more
For more on this story, see: New Atlas — World’s largest green H2 hub, Hydrogen City, to open in Texas in 2026
For more from Good News for Humankind, see:
- Indigenous land rights and COP30: 160 million hectares
- Renewables now make up at least 49% of global power capacity
- The Good News for Humankind archive on clean energy
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