Making green hydrogen from water & sunlight
A mobile-first guide to how renewable electricity splits water into clean hydrogen fuel — the technology, the energy cost, and the economics across the western United States.
What makes hydrogen "green"?
Hydrogen is colorless — the "colors" describe how it's made.
Hydrogen is the most abundant element in the universe, but on Earth it's almost always bound up in other molecules like water (H₂O) or methane (CH₄). To use it as a fuel, you have to pull it out — and how you pull it out determines its climate impact. Green hydrogen is made by using renewable electricity to split water through electrolysis, producing no direct carbon emissions.
Explore the guide
Five short chapters, built for reading on a phone.
How electrolysis works
The reaction that splits water, the parts of an electrolyzer, and how much energy each kilogram really takes.
Read chapter → 🔬AEM vs PEM vs SOEC
The three membrane and cell technologies competing to make hydrogen — how they differ and where each fits.
Compare tech → 🛢️Storage & transport
Why the lightest element in the universe is so hard to hold onto, move, and keep from leaking.
Read chapter → 📈Economics in the West
Cheap solar, scarce water, and tax credits — what shapes the cost of a hydrogen project in the western U.S.
Read chapter →