In order to communicate effectively about land use in Pima County, we must understand that different individuals and groups of people have assigned meaning to places and landscapes in Pima County in accordance with their experiences and their mode of communication. Ten different cultures and their landscapes are described, providing a fascinating summary of the history of each group in the area.

With the passage of the Federal Endangered Species Act in 1973, the stage was set for a confrontation between urban development and the provisions of Federal Law. Language was amended to the Act that established standards that a plan would have to meet before the Fish and Wildlife Service could approve it and issue a permit for the take of a listed species. In those jurisdictions that have adopted this approach, conservation of natural resources is no longer an afterthought but a major element that has to be considered during the regular land use permitting process.