When Russia invaded Ukraine in February 2022, European countries which have been heavily reliant on Russian pipeline gas for years had to start storing their own energy supplies.
Europe turned to liquified natural gas (LNG), an energy source that is transportable and flexible and which is largely imported from Qatar, Australia, Algeria and the United States.
In Europe, one of the only LNG fixed terminals that exist which receives and stores the fuel is on the Greek island of Revithoussa.
Without this island, European countries could not keep heating and electricity supplies running this winter.
To date, many European countries are limited in LNG import capacity and are now endeavouring to quickly build new LNG infrastructures.
Source: CNBC