41.   The chemical is the only known lung carcinogen found solely in tobacco smoke.

42.   The carcinogens in tobacco smoke alter the genes in the lungs.

43.   The four-month-long trial would have marked the first time a jury was to consider whether secondhand tobacco smoke causes diseases.

44.   The Philip Morris ad campaign they complained about argues second-hand tobacco smoke poses little measurable threat.

45.   The Philip Morris campaign they complained about argues second-hand tobacco smoke poses little measurable threat.

46.   The simplest and most effective way to avoid polluting the indoor air with tobacco smoke is to ask all smokers to smoke outdoors.

47.   The study also found a three-fold increased risk of breast cancer among nonsmoking women who had been regularly exposed to tobacco smoke at home or at work.

48.   The study also linked environmental tobacco smoke to low birthweight babies, asthma and other respiratory problems.

49.   The trial marks the first time a jury will consider whether secondhand tobacco smoke causes diseases.

50.   Then, for seven weeks the rodents drank water containing NNK, a principal carcinogen in tobacco smoke.