Which is kind of a surprise, because I'd expect regular (in this case, a joint a day) inhalation of any kind of smoke — tobacco, marijuana, or wood — would lead to problems. Apparently not. #ddtb
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Marijuana Smoking Does Not Harm Lungs, Study Finds
A large new government study has found that smoking marijuana on a regular basis, even over many years, does not impair lung function.

However, pot smoke makes me dizzy and nauseated…more than tobacco smoke ever did.
Any smoke (any particulate matter, even, such as talcum powder) makes me cough excessively to remove it from my lungs. Marijuana smoke has the added nausea effect Marina speaks of.