[ommunist]

What the author was smoking? 20 a day of what? Cigarettes? These things have nothing to do with tobacco. Cigarettes are purely synthetical things. The real research could compare say, avid snus user with cigars smoker with pipe smoker with cigarettes smoker with marijuana smoker, with non smoker exposed to industrial work, with non-smoker exposed to work in civil construction, and so on. Poor isolation of factors and lack of statistics are signs of fake research.