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It may not be surprising, but it is concerning

3 , 4 The risk of death increases in proportion to the extent of exposure to cigarette smoke

It is beyond the scope of this analytical method to draw correlations between ammonia concentrations in mainstream smoke and free nicotine or to determine if ammonia is the primary driver of smoke alkalinity

Smoking accounts for 480,000 deaths every year

Tobacco-using mothers during pregnancy were generally older, had lower income, and less education, particularly the poly-tobacco users, all of whom resided in rural areas
