[3] Crocker, C
Trends shift as the interplay of cultural, regulatory, and health factors evolve
It was reported in the Plain Truth magazine that Cast-off smoke contains twice as much tar and nicotine, three times as much of a certain kind of benozopyrene (a suspected cancer agent), five times as much carbon monoxide (which robs the blood of life-giving oxygen), and 46 times as much ammonia as the smoke the smoker inhales! ( Plain Truth , New Truth About Smoking, January 1981)
Among the first signs are: a persistently irritated spot in the mouth that does not change or gradually worsens, white, red, or dark patches on the mucous membrane , signalling that tissue is reacting to repeated irritation, non-healing sores or ulcers that persist for more than one to two weeks, frequent gum bleeding without an obvious cause, swellings, hardened areas, or small lumps in the mouth