The article explores an innovative approach to energy storage where hydrogen, produced using renewable energy sources like wind and solar, is stored in massive underground salt caverns. This method is seen as a potential solution to the intermittency issues of renewable energy, allowing for the storage of large amounts of energy over long periods. The technology leverages the unique properties of salt caverns to securely and efficiently store hydrogen. Several projects in the U.S. and Europe, driven by government subsidies and the urgent need for clean energy solutions, are advancing this approach, with significant investments from both public and private sectors. The article highlights the cost-effectiveness of this storage method compared to traditional battery storage, making it a promising option for achieving a zero-carbon power grid.

https://www.wsj.com/business/energy-oil/salt-caverns-solar-wind-energy-storage-3042e28b