is tobacco more harmful than weed Infographic: Americans Say Sugar Marijuana Marijuana produces more secondhand smoke
Marijuana produces more secondhand smoke than tobacco Long term Marijuana Smoking Can Impair Blood Vessel Function UCSF MedConnection Does Marijuana Cause Lung Cancer? Keck Medicine of USC Comparative risk assessment of alcohol, tobacco, cannabis and other illicit drugs using the margin of exposure approach Scientific Reports Americans' Perceptions of Alcohol vs. Marijuana American Addiction Centers Don't smoke it with tobacco: scientists suggest ways to make cannabis safer Cannabis The Guardian
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