What drives a person to smoke cigarettes—and keeps one out of six U.S. adults addicted to tobacco use, at a cost of 480,000 premature deaths each year despite decades of anti-smoking campaigns? What role do emotions play in this addictive behavior? Why do some smokers puff more often and more deeply or even relapse many years after they've quit? If policymakers had those answers, how could they strengthen the fight against the global smoking epidemic?
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