The discovery of extensive geologic hydrogen reserves across the globe holds promise for a greener energy future. These reserves, created through natural geochemical processes deep within the Earth, offer an alternative to traditional fossil fuel-derived hydrogen. A recent study published in Science Advances estimates that tapping into just a small fraction, 2%, of these reserves could provide a significant amount of energy, albeit only sustaining the world's energy needs for a short duration. Despite this limitation, the sheer volume of geologic hydrogen surpasses the energy content of Earth's natural gas reserves, presenting a valuable opportunity for transitioning towards sustainable energy sources. However, challenges loom large regarding the extraction and utilization of geologic hydrogen. While the process is deemed relatively low-carbon compared to current methods, the scale of extraction required to make a substantial impact on emissions reduction poses logistical hurdles. Prof Bill McGuire from UCL underscores the need for a massive global initiative and extensive infrastructure to harness geologic hydrogen effectively. Additionally, uncertainties persist regarding the exact location of these reserves, further complicating extraction efforts. In contrast to the enthusiasm surrounding geologic hydrogen, some experts advocate for prioritizing established renewable energy technologies like wind and solar power. Prof McGuire emphasizes the abundance and accessibility of these renewable sources, suggesting that investing in geologic hydrogen extraction may not align with the urgency of addressing the climate crisis. The debate continues regarding the optimal path towards achieving net-zero carbon emissions, balancing the potential benefits of geologic hydrogen with the practical challenges and competing renewable energy options.