A German research team has identified extensive reserves of natural hydrogen gas in ancient rocks through advanced simulations. This discovery presents a promising avenue for transitioning towards sustainable energy sources by reducing reliance on fossil fuels. The geological process of 'serpentinisation,' occurring in mountainous regions, plays a pivotal role in generating large quantities of hydrogen. The study suggests that rocks reaching the Earth's surface through mountain formation offer the most favorable conditions for hydrogen gas production, potentially yielding 20 times more capacity than other methods. Notable mountain ranges like the Pyrenees, European Alps, and Balkans have already shown signs of natural hydrogen generation, sparking optimism for further exploration. The researchers anticipate that these findings will drive the development of a new natural hydrogen industry, promoting economic opportunities and environmental sustainability. By understanding the migration pathways of hydrogen and deep microbial ecosystems, scientists aim to pinpoint potential hydrogen reservoirs and optimize the utilization of this clean energy source.