"In another study, tobacco tar applied to the skin of mice was more carcinogenic than marijuana tar."

BAM!

Govt says cannabis is more toxic than tobacco.

erm...

"In one study comparing the adverse effects of marijuana and tobacco, smoking less than one marijuana cigarette a day diminished vital capacity as much as smoking 16 tobacco cigarettes."

"A later report also evaluating marijuana and tobacco smoke, finds that the gas-phase cytotoxins that are present may have no cytotoxic potential when inhaled by humans. 26

Various types of marijuana may contain up to 50% more polyaromatic hydrocarbons in its smoke than tobacco does, high levels of which are associated with susceptibility to bronchial carcinoma. Marijuana appears to be frequently contaminated with aspergillus mold. In one study, 11 of 12 samples tested were contaminated. Spores of aspergillus pass readily through marijuana cigarettes into smoke, 27 and can result in fungal sensitization. 28 This is important in light of the use of marijuana by immunocompromised patients. "

hrm?!

Maybe if most people could get quality herb instead of bricked up, uncured, seed, stick, and mold riddled herb...