start smoking cigarettes Before 18 Tied to Increased Respiratory Symptoms in Young Adults Sharp increase in middle-class women

Among current smokers, income and education level (much more than race) still remain the two biggest predictors of who smokes

Overall, 18.8% of adultsabout 47.7 million peoplereported using at least one tobacco product, including cigarettes, cigars, e-cigarettes, or smokeless tobacco

These chemicals leach down to aquatic ecosystems (Novotny et al

7 However, decreased CYP2A6 activity may influence smoking and carcinogen exposure in any smoker, and the relationship of nicotine metabolism and CYP2A6 genotype to the lung cancer risk of smokers of European descent was recently established in the Transdisciplinary Research in Cancer of the Lung consortium genome-wide association study data set