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2.  Approximately 1 out of every __ deaths in the U.S. is attributable to smoking. a) 5 b) 10 c) 20 d) 100 Correct Answer: a) 5. Any level of exposure to tobacco smoke is unhealthy. There are approximately 443,000 deaths attributed to tobacco use each year in the United States, almost 50,000 of those due to secondhand smoke exposure. According to the Centers for Disease Control and Prevention, if no one smoked, 1 out of every 3 cancer deaths in the United States would not happen.