Vaping: Safer than cigarettes or a new health crisis? E cigarettes can result in 'Popcorn Lung' E cigarettes may emit harmful substances, raising safety concerns E Cigarettes, Vaping, and Other Electronic Nicotine Products: Harm Reduction Pathways or New Avenues for Addiction? Psychiatric Times Heated Tobacco Products, Cigarettes, and E Cigarettes: What's the Difference PMI Science Alert! e cigarettes may be as harmful as tobacco smoking, says study