Natural hydrogen trapped in the Earth's crust holds the potential to power humanity for an extended period without emissions. Scientists from the University of Oxford, Durham University, and the University of Toronto have identified the essential geological factors required to locate natural clean hydrogen reserves underground. This natural hydrogen, produced over millions of years, can accumulate in specific rock formations and offers a global opportunity for industries to transition towards cleaner energy sources. The research indicates that hydrogen is not just a clean fuel option but also crucial for food production and carbon-neutral plans. However, the current hydrogen production methods release a significant amount of carbon dioxide, highlighting the importance of finding emission-free alternatives. The study outlines a clear exploration strategy, detailing the rock types, temperatures, fluids, and geological histories that facilitate the formation and storage of hydrogen in reservoirs. By leveraging Earth's own crust, which has generated hydrogen over billions of years, humanity could access emission-free hydrogen reserves. Snowfox Discovery Ltd., formed by the study authors, aims to explore and utilize natural hydrogen accumulations. This groundbreaking research emphasizes the potential of natural hydrogen reserves in meeting energy needs sustainably and driving the global transition towards a low-carbon future.