Q: What are the long-term effects of marijuana use?

Itâ??s hard to know for sure whether regular marijuana use causes cancer. But it is known that marijuana contains some of the same, and sometimes even more, of the cancer-causing chemicals found in tobacco smoke. Studies show that someone who smokes five joints per day may be taking in as many cancer-causing chemicals as someone who smokes a full pack of cigarettes every day

they have that on the list but they dont know for sure wtf is this bullshit???
Anonymous Reviewed by Anonymous on . Hah, you humor me http://www.nida.nih.gov/MarijBroch/Marijteenstxt.html The government is great its so cute :D Its those damn teenagers with their damn pot sleeping with the negro jazz musicians. Rating: 5