does tobacco come from a plant Where from? Answered Tobacco | Diseases and Pests,

In 19192, the market share of Marlboro had declined considerably form 25.8% in 1992 to 24.4% in 1992 (Harvard 1997)

According to the author of the same study mentioned above, William Blot of the Vanderbilt-Ingram Cancer Center, Our data indicated there is no evidence that menthol smokers have a harder time quitting smoking. If menthol cigarettes were more addictive, we should expect to see menthol smokers using more cigarettes per day than non-menthol smokers, but the reverse is true

Every cigarette smoked is harmful

Installation : There is no assembly required, though you may want to swap out fuses (the ShockFlo comes with 12-amp, 15-amp, and 20-amp fuses) depending on your cars cigarette lighter amperage