Hydrogen storage is a field of research that focuses on developing efficient and safe methods for storing hydrogen gas as a potential renewable energy source. Hydrogen is a clean and abundant fuel, but it is challenging to store in a compact and lightweight form. Researchers are exploring various storage methods, such as high-pressure gas tanks, cryogenic storage, chemical storage in materials like metal hydrides, and underground storage in salt caverns or porous media. The goal is to develop storage technologies that can safely and efficiently store hydrogen for use in fuel cells, transportation, and other applications.