As I said in 1st post, I mitigate my risks as well as I know how. Check my 2nd rant above. Also, my step-father died a short battle with Endocratic cancer in 2012 @ 63yo. He smoked on tour in Nam for < 2years. 42 years later his death was attributed to 'tobacco', "Probably". The certificate actually had a check box for 'probably'.
Ignore, if you will, the agent orange, forget the smog, forget the crap he ate and his voluminous waistband or the fact that he sat in his chair for 8+hours a day after work and definitely forget the lacquers & paints he inhaled as a gifted cabinet maker for decades. It was the tobacco that killed him, says so on his death certificate.