Flipped through an old issue of National Geographic yesterday, and read about the Greenlandic mummies of Qilakitsoq. The lungs of the females contained three times as much soot as the lungs of average city dwellers today.
The reason is that these women spent their lives tending blubber lamps, the only source of man made light available to the Inuit at the time.
I need to be reminded of these things. I have a tendency to believe that simple lives are healthy lives, but it is never that easy.
So go easy on those blubber lamps.