emerson tobacco Hart - Cigarettes And Gasoline Ralph Emerson Cigar Proof Book
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footnote 17 The survey findings point to differences by age in nicotine concentrations used

But when you consider that 40% of American smokers (mostly young adults) combine tobacco and smoking marijuana, that is still a large number of people

The main ingredients of smokeless tobacco products are nicotine alkaloid, tobacco-specific N-nitrosamines (TSNA), N-nitrosamino acids, volatile N-nitrosamines, formaldehyde, acetaldehyde, hydrocarbons, and heavy metals like polonium-210 are described [4]

so, 9.6/10

Christine Courbasson, Ph.D., C.Psych