Vaping and e cigarette use is a troubling trend Fort Plain Central School District Propylene glycol and vegetable glycerin e cigarette aerosols impact mucociliary function and cause cytotoxicity in human airway epithelium Scientific Reports Propylene glycol hi res stock photography and images Alamy View of a ClopiNette store in Paris, France on August 23, 2012. ClopiNette stores sell electronic cigarettes, also known as e cigarettes to help the consumers to quit smoking. The electrical device simulates Smoking vs vaping what are the key differences? Evapo