The EU is highly dependent on energy resources. More than a half of EU energy consumption is linked to imports. Increasing instability in the Middle East together with the deterioration of EU-Russia relations mean that energy security will remain at the top of the EU's agenda in the coming years. How can we achieve a true energy union? How can interconnectivity be increased between Member States? What should the ideal energy mix look like and how can energy efficiency be increased within the EU? The publication summarises the debate that seeks answers to these questions. The discussion was organised by the EESC Employers' Group in November 2014 in Zagreb, Croatia.