A cool energy storage solution from the UK.

https://www.independent.co.uk/environment/north-sea-rocks-renewable-energy-wind-power-green-nuclear-compressed-air-storage-a8738901.html

“After the Japanese firm Hitachi announced it was withdrawing support for a major nuclear plant, there was speculation about how the government will fill the energy gap left by failed nuclear plans. 

Environmental groups say the shortfall can be made up by investing in renewable energy – particularly wind power.

However, critics say the erratic nature of wind and solar energy will not be able to provide the constant supply required to power Britain’s grid.

Building devices that can store green energy for when the wind is not blowing or the sun is not shining would allow the UK to keep the lights on without relying on climate-harming fossil fuels.”