According to the textbook, the prevalence of adolescent smoking is a direct function of:

Coordinate capacity of the quantity of retail outlets offering tobacco in their prompt neighborhood. 
Tobacco cigarettes: Nearly 90 percent of grown-up smokers started smoking before age 18 and 11 percent of secondary school seniors announced smoking in the most recent month. Smokeless tobacco: Use of smokeless tobacco among teenagers is less basic than cigarette smoking.

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