Title: 'Towards energy Efficient Cities' (link: http://www.youtube.com/watch?v=4wmLdNtBvik&list=PLsRNoUx8w3rOBnUyOgj-IayJu7zs0-6D_&index=3) Event: TEDxCity 2.0 Date: 20/08/2013 Place: Girona, ESPANYA