"Marijuana smokers appear to be at a significantly lower risk of developing cancer than tobacco smokers, according to an article by Amanda Chen et al. published in the Journal of Psychoactive Drugs (Sept, 2008).
The authors analyzed existing evidence on the carcinogenicity of marijuana smoke. Although it has long been hypothesized that marijuana smoke might cause cancer because it contains tars with known carcinogenic properties, like tobacco smoke, the authors note that epidemiological studies have so far failed to show a convincing causal relation between marijuana and smoking-related cancers."
So marijuana is illegal while cigarettes are sold everywhere because....................
Maybe someone can help me out on this one?
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