The Dawson County Board of Commissioners last week approved an ordinance that will contribute to the health and safety of county citizens by helping to reduce habitats for mosquitoes and rodents to breed and spread disease. The ordinance includes regulations for the proper storage and disposal methods of used and scrap tires within the county. Improperly stored tires create habitats for insects and animals that spread diseases like yellow fever, Zika and more, according to Sandy Sawyer, a nurse at local Dr. Larry Anderson's practice.