A groundbreaking study by geologists from the U.S. Geological Survey in Denver has revealed the immense potential of Earth's subsurface in holding natural hydrogen. The researchers utilized a sophisticated model incorporating various geological factors to estimate that there could be as much as 5.6 × 10⁶ million metric tons of hydrogen hidden beneath the Earth's surface. This discovery challenges previous beliefs about the scarcity of naturally occurring hydrogen. The study highlights that hydrogen can form through natural chemical reactions in rocks, a phenomenon previously underestimated until significant reservoirs were uncovered in Albania and West Africa. While accessing most of this hydrogen may be challenging, harnessing even a small fraction of it—just 2%—could meet global energy demands for a substantial period. The model developed by the scientists integrates knowledge of hydrogen distribution, production rates, and leakage from rocks to provide a comprehensive evaluation of this abundant energy source. This research opens up new possibilities for utilizing natural hydrogen reserves to address energy needs sustainably and underscores the importance of further exploration and extraction technologies.