Facilities used for storing natural gas to balance supply and demand, ensuring energy security and stability of gas prices. The gas storage levels indicate whether there is more demand or supply in gas markets, thus influencing the price levels.

Achieving a balance between the amount of greenhouse gasses emitted and removed from the atmosphere, resulting in a net-zero carbon footprint. The European Union will achieve net-zero emissions by 2050.

Interchangeable and identical in value and quality over time and space with other assets of the same type. EUAs are a fungible asset.