what the experts say, but its what the real people do for themselves, like many have said, its down to each of us whether we smoke, dont smoke and so on, no one smokes in my house my car, and if i am working in the lorries that too, infact no one smokes around me at all, unless i go into their house, thats my choice, lots of my older family has started to not smoke so better late then never for them, i am lucky too with 4 of my children not smoking but alas 1 still does, dont know why, she does not know why either, its a drug, if only we had all this information years ago would it make a difference i dont think so