The public health implications are obvious, perhaps frightening. Among the report's findings are that: Second-hand smoke kills an estimated 3,000 non-smokers each year, it is responsible for 20 percent of lung cancers that are not already attributable to direct smoking, and the cancer risk for a non-smoking spouse of a smoker is one in 500. Worse, the risks escalate for children. The EPA found that children who are exposed to tobacco smoke are  more likely to develop asthma, respiratory infections and ear infections.