How much tar is in marijuana cigarettes?

Answer

That has to be balanced out with the fact no pot smoker in the world would smoke as many marijuana cigarettes in a day as a tobacco smoker smokes tobacco cigarettes. A moderate smoker might smoke a pack a day. If you smoked 20 joints a day you would be so stoned you couldn't move.
Different Answer
4 times compared to a tobacco smoker.
WHY?
marijuana smokers smoke "hand rolled" joints, and tobacco companies have machines that roll the cigs. for them, so the joint isn't as packed as the cig. so the filtration is less and thus you inhale more "particles" Also marijuana smokers hold their breath 4 times longer then a tobacco smoker, allowing more particles to settle in the lungs. And they're are many ways to smoke/use marijuana that take out most of the tarring chemicals such as: water bong, vaporizer, eating it, water pipe... But if you go out and take a dry leaf from your tree and smoke it your going to get tar from it, any dry smoke able substance you inhale will leave a tarry residue. Studies have shown that even very heavy marijuana use will not lead to any form of cancer to the lungs, throat, mouth, tongue etc.
Oh and I've smoked over 15 BLUNTS(2x-3x bigger then joint) in one day and i believe i could function perfectly and could move quite well actually!!
Also I'm a very marijuana smoker and my breathing is fine and i have no problems with my lungs. I'm a runner too.  

Answer

I must know: how did you smoke 15 blunts in one day? A blunt is rolled in the wrapper off a cheap cigar, or a wrapper that could have gone on one. It takes about half an hour to smoke one of those cigars, so...fifteen blunts is seven and a half hours of doing nothing but smoking dope. If you gotta smoke weed for seven and a half hours to get a decent buzz on, switch dealers; the one you have is dealing ditch weed.
, or whenever I read "facts" (facts that are based on studies 50 years old that have been proven wrong countless time since then...) on marijuana from
the government, I can't help but laugh.

At the same time, it's sad that people can't open up their eyes: Marijuana is not the Devil society try to convince us it is.

But let's get some false fact first, and try to correct them.

"Marijuana has some of the same cancer-causing substances as tobacco. One joint can deliver four times as much cancer-causing tar as one cigarette."

This is true if you take a ratio of marijuana plant / tobacco. But if you take the buds (the part that is smoked in marijuana), then it delivers 1/3 of the Tar the same weight of tobacco would deliver. In the first study on Marijuana smoke, scientists have burned the whole plant - leaves, stems, buds, everything. That is why there was this much tar. Even if this fact was proven wrong with a recent study, there's no way the government or groups like Above the Influence would change their sayings to "Tobacco can deliver three times as much cancer-causing tar as one joint", now would they?

I guess Anti-drugs groups would still say it's wrong to smoke weed even if government made it legal. They remind me of preacher telling people not to masturbate because they would become deaf. But anyway, I'm getting away from the subject.

"Marijuana is Illegal" I can't say it's not true, but it's illegal because the government can't say "Hey, we were wrong on the War on Drugs, we spent X billions but thing is... marijuana is actually good, sorry to everyone we put in jail". It's illegal because it's part of the politics game, not because it's bad.

"Smoking pot affects alertness, concentration, perception, coordination and reaction time, many of the skills required for safe driving and other tasks. These effects can last several hours after smoking."