Tobacco Free Lincoln CoTobacco Free Lincoln CountyJune 22, 2021pregnancy, secondhand smoke, SHS, Environmental Health Perspectives, smoke-free parks, smoke-free multiunit housing, smoke-free multi-unit housing, SF MUH, Clean Indoor Air Act, North Platte, Gothenburg, Maxwell, Sutherland, Big Springs, Lewellen, Chappell, Duke University, North Carolina State University, Virginia Commonwealth University, umbilical cord blood leukocytes, smoke-free vehicles, NEST, Newborn Epigenetic Study, Newborn Epigenetics Study