California Code, Health and Safety Code - HSC § 118920

(1) Involuntary smoking is a cause of disease, including lung cancer, in healthy nonsmokers.

(2) The children of parents who smoke compared with the children of nonsmoking parents have an increased frequency of respiratory infections, increased respiratory symptoms, and slightly smaller rates of increase in lung function as the lungs mature.

(3) The simple separation of smokers and nonsmokers within the same air space may reduce, but does not eliminate, the exposure of nonsmokers to environmental tobacco smoke.

(1) Nonsmokers have no adequate means to protect themselves from the damage inflicted upon them when they involuntarily inhale tobacco smoke.

(2) Regulation of smoking in public places is necessary to protect the health, safety, welfare, comfort, and environment of nonsmokers.