A hidden source of clean energy could power the planet for over 170,000 years, according to research published in Nature Reviews Earth & Environment. It suggests that hydrogen reservoirs beneath the Earth’s crust, formed over a billion years, could meet current global energy needs. The study emphasizes the importance of developing effective exploration strategies to extract this hydrogen sustainably, which is crucial for transitioning to a carbon-neutral future, as global demand for hydrogen is expected to rise significantly by 2050.