However bad you thought smoking was, its even worse
Varela-Lema L, Taioli E, Ruano-Ravina A, Barros-Dios JM, Anantharaman D, Benhamou S, et al Meta-analysis and pooled analysis of GSTM1 and CYP1A1 polymorphisms and oral and pharyngeal cancers: A HuGE-GSEC review Genet Med
That said, it happened before the point where I would have found this to be acceptable
Sterile Medicinal Products I Injectables I Infusions I Ophthalmics Regulatory Guidance References for Cleanroom Smoke Studies ISO 14644-3:2019 Cleanrooms and associated controlled environments Part 3: Test methods ISO 14644-3 provides standards and guidelines for testing cleanrooms, including airflow patterns and pressure differentials
Findings of the Study While the study acknowledged that there wasn't a substantial decline in heart attack cases after the 2017 legislation, it emphasized that an average reduction in rates was witnessed across all age groups and in both genders