Europe is "under increasing threat" from global energy prices as their fossil fuel stock dry up, experts have warned.
Dr Aled Jones, director of the institute, said:
These maps show vulnerability in many parts of the EU and they paint a picture of heavily-indebted European economies coming under increasing threat from rising global energy prices.
It is vital that those shaping Europe's future political agenda understand our existing economic fragility.
The EU is becoming ever more reliant on our resource-rich neighbours such as Russia and Norway, and this trend will only continue unless decisive action is taken.
More top news
Pope Francis has used his Christmas sermon to condemn the "brutal persecution" of minorities by Islamic State.
We look back at some of the stories, people and events that stood out in 2014.
It will be a frosty Christmas morning across the UK but any chance of snow is limited to the Scottish mountains.