Enacts new GS 160D-1321 allowing a city or county (after holding a public hearing after providing the specified notice of the hearing) to adopt ordinances to provide standards for the preservation or replacement of trees on public and private property within its jurisdictional limits because of their contribution to (1) the health of its citizens in improved air and water quality; (2) the control of flooding, noise, glare, and soil erosion; (3) the protection of urban wildlife; (4) the maintaining and increasing of property values; and (5) the beauty of its overall landscape. Specifies that for cities, the ordinance also applies in the city's extraterritorial jurisdiction.