Discussion by various participants involved in constructing the AA's installation at the EcoBuild exhibition held at Earl's Court in March 2009. Four Undergraduate Units (Inter 2, Inter 10, Dip 2, Dip 16) and four Graduate Programmes (Sustainable Environmental Design, Housing & Urbanism, DRL, EmTech) constructed various prototypes and research projects for the exhibition. The AA projects are related to sustainable, ecological and innovative solutions for the 21st century, displaying a diversity of approaches from digital to material, theoretical to prototypes, and formal to process.Introduction - Tanja SiemsInter 10 - Claudia Pasquero and Marco Poletto Dip 2 - Anne Save de Beaurecueil and Franklin LeeDip 16 - Jonas Lundberg