Evaluating hydrogen degassing in active fault zones: The North Pyrenean Frontal Thrust case study.

The process of obtaining naturally occurring hydrogen gas from deep within the Earth's crust.

A controversial mining technique used to extract oil and natural gas from deep rock deposits by injecting a high-pressure mixture of water, sand, and chemicals underground.

A natural geological process where certain types of rocks react with water to create hydrogen, occurring beneath the Earth's surface for billions of years.