does cigarette smoke produce carbon monoxide Did you know? (CO) is the main substance we're concerned about when it comes to smoking in pregnancy. CO is a poisonous gas you can't see or smell. It reduces Carbon monoxide poisoning: Another reason

We saw a definite effect of cigarettes on the arteries, even in young people who you would expect to be healthy, he said.

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Animals naturally avoid breathing cigarette smoke, so lab rats are forced into tiny canisters, and cigarette smoke is pumped directly into their noses

Your smoking time drops down considerably in a smaller cigar, so you can get back inside to warm up if you need to

What do you think theyll do next time they have a patient who wants to stop smoking

Here's What the Science Says UTSW/Nicotine Cessation Program Interview highlights were lightly edited for clarity