energy wind farms depend on weather conditions as do solar power farms. power fluctuations can currently be covered in part by pump storage plants but the new technology creators say their method is superior new zealand. as if we are twenty to thirty percent cheaper than pumped storage hydro electricity and we don't need to encroach on nature by building huge dams or reservoirs. it's all inside the mountain. so in addition to the economic factor it's also an advantage in environmental terms. and there's indeed barely any evidence of the compressed air energy storage above the surface and if you intrusions on nature lower down. so we have a five metre concrete plug withstand the pressure in the cabin on the steel door