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(2007b) found only a small contribution of chronic smoking to the formation of acetaldehyde DNA adducts, whereas alcohol consumption had a much higher effect, suggesting again that in chronic smokers lower amounts of acetaldehyde enter the circulation than in alcohol consumers

PMID 11171847
To find out, lets go back a few years to a report on gateway drugs that was written in 1994

Cons: Requires more maintenance and cleaning

[6] Tobacco use is a major contributor to the top four causes of death among African-Americans: heart disease, cancer, stroke and diabetes
doi: 10.1183/09031936.00141514