Hydrogen storage refers to the methods used to safely store hydrogen gas for later use. Hydrogen can be stored in various forms, including as a compressed gas, in liquid form, or within solid materials. Each method has its advantages and challenges, such as energy density, safety, and cost. Effective hydrogen storage is crucial for applications like fuel cells and renewable energy systems. By storing hydrogen, it can be used as a clean energy source, helping to reduce reliance on fossil fuels and lower greenhouse gas emissions. This technology plays a significant role in the transition to a more sustainable energy future.