I suspect passive smoking can have an effect, I base these suspicions on the state of the ceilings of the pub my parents had in the 60's as the freshly painted ceilings slowly "matured"
I prefer to stand upwind of a smoker unless they roll their own 
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"That government is best which governs least."
"This is a sharp Medicine, but it is a Physician for all diseases and miseries".
"To be "matter of fact" about the world is to blunder into fantasy --and dull fantasy at that, as the real world is strange and wonderful."
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