Could underground caverns hold the next solar storage technology?

By Kathie Zipp With solar and wind energy becoming more important energy sources in Europe, countries are searching for new types of energy storage facilities. Some countries use hydropower as the least expensive method of storage, but this is only feasible in mountainous regions such as Norway. What if countries who don’t have the water source could use air?
The European Union and scientists from all over Europe are exploring this idea through a research project known as RICAS 2020. The main focus of the project is using sealed disused caverns as storage sites. The two largest compressed air stores in the world

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