Lisa,

Did you mean carbon Monoxide??  That is what I learned.  I also caution my
moms to avoid second hand smoke.  If they cannot (live with the smoker) I
tell them to increase their intake of vitamin C and green leafy veg.  (I have
them do this through diet).

Martha Grodrian Brower, Queen of all sorts of dumb stuff, mostly a messy
house which can be imagined into a throne!!