Footnote

a Two types of smokeless tobacco are in common use: snuff and chewing tobacco. There is dry and moist snuff. Among young people, moist snuff—finely cut tobacco treated with sweeteners, flavorings, and scents, in a can or in tea-bag-like packets—is the most popular form of smokeless tobacco. “Dipping” refers to placing a dip—the amount of tobacco picked up between the thumb and the forefinger—between the lip or the cheek and the gum.