Undesirable plants that infest either land or water resources and cause physical and economic damage. Under the Federal Noxious Weeds Act of 1974, (P.L. 93-629, January 3, 1975), the Animal and Plant Health Inspection Service works to prevent noxious weeds from entering the country, and conducts cooperative control/eradication programs with the states. Local governments frequently impose taxes on landowners to carry out noxious weed control programs.