These gravity-based energy storage systems could enable some of the world's tallest buildings to generate renewable energy. Energy Vault has teamed-up with architects Skidmore, Owings & Merrill (SOM) to explore how gravity energy storage systems (GESS) could be integrated into skyscrapers. GESS uses surplus energy to lift heavy blocks to height, creating potential energy that can later be converted into electricity when the blocks are lowered to the ground. Unlike pumped hydro storage facilities