 A non-smoker who is inhaling sidestream or second-hand smoke has a 30% greater risk of getting lung cancer at some point in their lives.Exposure to second hand or sidestream smoke has been associated with people who have not smoked before.The US Environmental Protection Agency estimates sidestream smoke causes approximately 3,000 lung cancer deaths and 62,000 deaths from heart disease in non-smokers every year in the United States.