Pneumatic energy storage is a method of storing energy in the form of compressed air. This process involves using excess energy, often from renewable sources like solar or wind, to compress air and store it in underground caverns or large tanks. When energy is needed, the compressed air is released, driving turbines to generate electricity. This technology is beneficial for balancing energy supply and demand, especially during peak usage times. It can help stabilize the grid and reduce reliance on fossil fuels. Additionally, pneumatic energy storage systems can be more environmentally friendly compared to traditional energy storage methods.