“Exposure to secondhand smoke (SHS) from burning tobacco products causes premature death and disease in nonsmokers. Despite reductions in SHS exposure over the past 25 years, millions of US nonsmokers continue to be exposed, particularly certain population groups such as African Americans and those with lower socioeconomic status. The Surgeon General has concluded that there is no risk-free level of SHS, and that eliminating smoking in indoor areas is the only effective way to fully protect nonsmokers from exposure.”
Excerpt from Huang J, King BA, Babb SD, Xu X, Hallett C, and Hopkins M. Sociodemographic Disparities in Local Smoke-Free Law Coverage in 10 States. Am J Public Health. 2015;105(9):1806-1813.