A new study published in Nicotine & Tobacco Research found that those using e cigarettes alone were more than twice as likely to develop COPD than people who didn't use any tobacco products, Vaping Marijuana Causes More Lung Damage Than Vaping or Smoking Nicotine Vaping and how it affects lung function ndd Medical The role of puff volume in vaping emissions, inhalation risks, and metabolic perturbations: a pilot study Scientific Reports