This population workshop took place in Melbourne's strongly multicultural northern suburbs, at a Community house open day in Thornbury. It deals with Australia's population and planning problems from the point of view of socially and ecologically sustainable future. What is causing Australia's very high population growth? How to preserve Australia's established multicultural communities? How to limit growth. Democracy and planning. Relocalisation and planning. Interactive with audience. Mark Allen studied town planning at the University of South Australia and has worked as a planner in three states. His frustration at the planning system's inability to deliver sustainable outcomes led him to leave the profession in order to concentrate on spreading awareness about the important role that town planning can play in mitigating climate change, biodiversity loss and social isolation. Mark's approach to sustainable planning is heavily influenced by two of his mentors, permaculture co-founder David Holmgren and labor MP Kelvin Thompson who advocates for a slower more manageable rate of population increase.