11.   According to Glantz, even small amounts of tobacco smoke contain sufficient doses of toxic substances to trigger ill health effects.

12.   Ahron Leichtman founded Citizens for a Tobacco-Free Society because the merest whiff of tobacco smoke gave him a headache.

13.   Air pollution, most commonly from tobacco smoke, and straining your voice by shouting or trying to talk in a noisy place can also irritate the throat.

14.   But evidence is really accumulating that tobacco smoke is tobacco smoke is tobacco smoke.

15.   But the authors say this approach ignores the complex chemistry of environmental tobacco smoke.

16.   Children who are exposed to secondhand tobacco smoke are at risk for developing a number of health problems.

17.   Cigarette smoking exposes the body to many oxidizing substances in tobacco smoke and tar.

18.   Cotinine, a nicotine residue, is commonly used to measure exposure to tobacco smoke.

19.   Despite all the evidence that tobacco smoke is deadly, Americans seem hesitant to take drastic steps to protect themselves.

20.   Duncan originally proposed a bill to regulate indoor air quality that had exempted tobacco smoke, but the council added it to the measure.