Carlos Smaniotto Costa (IOER, Dresden, Germany) and Ina Šuklje Erjavec (UPIRS, Ljubljana, Slovenia): The GreenKeys approach to urban green space development and the Sofia Declaration for urban green spaces.
Milena Deneva and Veliana Naydenova (Green System Directorate of the Municipality of Sofia, Bulgaria): The green system of Sofia.
Nicola Mathers (CABE Space, London, UK): Policies and strategies for urban green spaces.
Maja Simoneti (LUZ, Ljubljana, Slovenia): Demanding users - a critical factor for the future of urban green space.
Peter Wilkinson (Parks Service Manager, Bristol City Council, UK): Green space management in Bristol.
Paschalis Arvanitidis (University Thessaly, Volos, Greece): Perceptions and attitudes on urban green spaces: an economist’s view.
Enriched by the inputs delivered by the keynote speakers the participants attended the 9 sessions of the Debate Arenas .