Mayo Clinic researchers have amassed additional evidence that secondhand smoke kills and smoke-free workplace laws save lives.
Their research shows that the incidence of heart attacks and sudden cardiac deaths was cut in half among Olmsted County, Minn. residents after a smoke-free ordinance took effect. Adult smoking dropped 23% during the same time frame, as the rates of other risk factors such as high blood pressure, high cholesterol, diabetes and obesity remained stable or increased.