When I was a kid, I worked at a high volume gas station as a pump jockey. We always pumped over 5000 gallons of gas in an 8 hour shift. And we all smoked. All the time. Never gave it a second thought. But at the time, we also painted cars with lacquer and never used a mask. And cleaned lots of parts with carbon tet. Relined more asbestos brakes than I care to think about. I ride my motorcycle way to fast to worry about most other health concerns....