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