 The organization encourages cities to adopt smart growth policies, to accommodate the Bay Area's increasing population while protecting open space and making the region's cities better places to live.It has been involved in the adoption of urban growth boundaries in more than 20 cities and 5 counties in the Bay Area.These boundaries draw a line to define where growth should and should not go, and are generally either adopted by voters through the initiative process, or by city councils or county boards of supervisors.