Every year in late fall, across the valley that is home to Phoenix, Arizona, Fields that appeared empty just days before turn white as cotton ripens and becomes ready to pick. For some, this is not the plant to have in urban areas, as heavy pesticide use follows where cotton grows. This particular field is in the shadow of a new stadium being built in Glendale; in just a few years, identical track homes and generic strip malls will replace agriculture as Phoenix and its surrounding communities continue their crawl to the edges of Maricopa County.