The damage to the lungs from smoking marijuana, in which abnormal, large air sacs called bullae form and can rupture, may be the reason marijuana smokers are at risk for developing a pneumothorax, which is when air gets into the space outside the lungs and causes a collapsed lung
However, you can see how it would disturb the big tobacco companies
Additionally, the rising popularity of partying and pub culture among millennials and working-class people has especially fueled the demand for flavored and unflavored cigarettes around the world in recent years
Cochrane Database Syst Rev 1(1):CD010216 Gorini G, Gallus S, Carreras G, De Mei B, Masocco M, Faggiano F et al (2020) Prevalence of tobacco smoking and electronic cigarette use among adolescents in Italy: global youth tobacco surveys (GYTS), 2010, 2014, 2018