21. A double dose of passive smoke . . . approximately doubled the risk of erectile dysfunction. 22. Even passive smoke from cigars and pipes can be harmful to others, according to health researchers. 23. But the usually cautious WHO retorted with a statement titled " Passive smoking does cause cancer. 24. The role of passive smoking is increasingly being recognized as a risk factor for lung cancer, 25. Professor Richard Peto, a committee member, said smoking was a much greater risk than passive smoking . 26. Passive smoking and / or smoking before the pregnancy influences the probability of a preterm birth.27. Other cancer deaths resulted mainly from chemicals, radiation, dust, passive smoking and diesel exhaust, it said. 28. This editor has been edit-warring on passive smoking . 29. Even passive smoking appears to increase the risk. 30. Due to passive smoking , even children were affected.
