The Sonoran Desert Conservation Plan is guiding regional efforts to conserve the best lands and most precious resources for future generations of Pima County residents to enjoy. The Plan combines short-term actions with long-range land-use decisions in Pima County, one of the most biologically diverse counties in the U.S. From cactus-studded deserts to conifer forests, the diverse landscape of Pima County is the home to a million residents from diverse ethnic and cultural backgrounds, and contains a rich diversity of plant and animal life.