LOL! How funny! Yup, cigarettes contain CO. I'm not dependent on CO, however. I like a little nicotine high now and then. I smoke a couple of packs a week for a total of $8.00/week. Yes, beleive or not, American Spirits are only $4.00/pack - OK, $4.10/pack here in Colorado.
I find it amusing that two heavy dopers want to jump my case about my two pack a week cigarette habit. Pot kills more brain cells than ever cigarettes do, and it does a worse number on the lungs, as well.
You boys need to get a life!