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Secondhand bong smoke worse than that from tobacco, study finds Cannabis The Guardian Smoking cannabis may be more harmful to lungs than tobacco: study Smoking Marijuana Vs. Tobacco: What Science Says About Lighting Up California sober: what does it mean and is it good for you? Well actually The Guardian How scientists rank drugs from most to least dangerous and why the rankings are flawed Vox Does Smoking Weed Cause Lung Cancer? Understanding the Risk GoodRx
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