I always tell myself to stop trolling and correcting people but I know it's been a year since this post and you probly won't read it but here it goes: actually, marijuana has a lot higher tar content than tobacco. First of all I knew you didn't know what you were talking about because you said they added tar. Lol you don't add "tar" it's just a byproduct of heating plantlike material and resins found NATURALLY in plants, almost all plants in fact, including marijuana and tobacco. They all have resins it's a part of their anatomy, these resins ARE tar. You should really research this stuff if you involve it in your life and most certainly don't post about it on a e forum. Cancer being cured by marijuana is ridiculous. I mean completely wrong and ridiculous, and there is no way you can even do a study to test this hypothesis. Now, marijuana may ease the symptoms associated with cancer because of its effect on the brain, but in no way does marijuana "cure" cancer. Lastly, You are right about one thing, there are many additives in cigarettes that are not found in marijuana. The main thing is marijuana is natural, but is also somewhat dangerous if smoked in copious amounts, and tobacco is natural, but the difference is NICOTINE, which is super ass highly addictive even moreso than heroin, therefore your risk of developing a habit to cigarettes is higher than marijuana.. Ok I had some more stuff to say but i gotta go... Remember to never stop learning, and if you think you know something, research it anyway and prove that you are right, look stuff up and read about it, anything and everything, never stop learning knowledge is power!!!!!!