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And because cigar wrappers are more porous than rolling papers, the burning is less complete, resulting in smoke that has higher concentrations of toxins

Abstract: Chronic obstructive pulmonary disease (COPD) is a devastating lung disease for which cigarette smoking is the main risk factor

Then comes fermentation, a natural process where heat and pressure release ammonia and other impurities to transform the leaf's chemical structure

An older study tested whether second-hand cannabis smoke can result in a positive urine drug screen

Just like Sweeney, she cited the products ability to mimic smoking as the key factor

This will be the first time well be able to look at this phenomenon longitudinally, Liu said