Cant really say the exact amount, would be based on how much you smoke, what method, and even what quality bud you are smoking.
Also THC and other cannabinoids prevent cancer through apotosis(programmed cell death). Cancer is causes when cells mutate and do not die when they are supposed to.
Lastly, smoking your pot pure is a good idea, as far as i know weed doesnt have anything which inhibts your smoke from passing mucus.(which cigerattes do).
It causes tar to build up on the lungs and it can cause serious injuries and maybe even death.
It damage your lungs and you may eventually get lung cancer due to the build up of tar in your lungs.
It blocks the air from getting to the lungs.
Kurayami: Tar enters your lungs when you smoke and can build up.
Chronic smokers have tar built up in their lungs. The lungs try to clean pieces of tar out, so when you cough or sneeze pieces of tar come out of your lungs.
smoking causes tar to build up on the lungs, and the Cilia can't function properly.
Pine tar it has many cancerogenic substances.You must use them carefully and not for a long periods.
emphysema emphysema
tar makes your lungs go bad
tar provents black stuff on you lungs
There is no tar in arteries, just in lungs. (From smoking).
your lungs. quit smoking.. very bad for you.