Coinciding with the 13th World Conference of Cities and Ports which will take place this year in Saint Nazaire and Nantes, the Conference of Atlantic Arc cities will hold  on 21 June afternoon in Nantes the meeting of its Port Cities working group, piloted by the city of Saint Nazaire.Following the success of the meeting of November 2011, on this occasion the selected topics are marine renewable energies, the project Portonovo and the developments of the Atlantic Strategy.