cigarettes cause coughing What Is Smoker's Cough Third-Hand Smoke - National Center
Description
Genomic and evolutionary classification of lung cancer in never smokers

The FDA suggests at least two contributing factors

[1] Among the youths and young adults [edit] Smoking prevalence among students in secondary schools, polytechnics, and Institute of Technical Education dropped from 8% (survey period: 2011-13) to 4% (survey period: 2014-16)
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Protect nonsmokers from secondhand smoke in all indoor public places and worksites, including all restaurants, bars, and casinos
