Earlier this year, University of Toronto scientists measured hydrogen flowing from billion-year-old Canadian Shield rocks through nearly 15,000 mine boreholes. Today, the site could yield more than 140 tonnes of natural hydrogen each year

Ancient Canadian Shield rocks are quietly producing white hydrogen, a naturally occurring gas that could reshape the clean energy market. Scientists measured hydrogen escaping from mine boreholes near Timmins, Ontario. Each borehole released about 8 kilograms a year. Across nearly 15,000 boreholes, that could exceed 140 tonnes annually. The finding gives natural hydrogen exploration something it lacked before: long-term, real-world evidence that underground hydrogen production can persist for years.