A new study suggests there could be trillions of metric tons of natural hydrogen waiting to be discovered beneath the Earth's surface. Hydrogen, seen as a key to achieving net-zero emissions, boasts benefits like clean energy production and higher energy density than batteries. However, traditional methods of green hydrogen production face obstacles due to cost and limited production times, leading to reliance on less eco-friendly gray and blue hydrogen. Recent geological discoveries in places like Mali have sparked a race to find natural hydrogen reservoirs globally, with estimates suggesting immense potential reserves. While uncertainties remain regarding accessibility and environmental impacts, harnessing even a small portion of this hidden hydrogen could meet global energy needs for centuries. The findings, published in Science Advances, highlight the need for further research in this promising field.