TY - SER AU - Buck, Christian TI - Trapping the wind KW - POWER GRIDS KW - ENERGY STORAGE N1 - Power produced from renewable sources such as wind and sunlight is irregular. Experts are therefore looking at ways of storing surplus energy so that it can be converted back into electricity when required. One option is underground hydrogen storage, which is inexpensive, highly efficient, and can feed power into the grid quickly ER -