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Many people think cannabis smoke is harmless a physician explains how that belief can put people at risk What do your cells think about you smoking marijuana? Ellipse Effects of cannabis smoking on the respiratory system: A state of the art review ScienceDirect Here's What Science Says About Smoking Pot Vs. Smoking Cigarettes Burning or Vaporizing Anything Causes Particulate Matter (PM 2.5) American Nonsmokers' Rights Foundation
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