Emissions from Electronic Cigarettes: Key Parameters Affecting the Release of Harmful Chemicals Environmental Science & Technology Daily exposure to formaldehyde and acetaldehyde and potential health risk associated with use of high and low nicotine e liquid concentrations Scientific Reports E cigarettes can emit formaldehyde at high levels under conditions that have been reported to be non averse to users Scientific Reports Vaping, Environmental Toxicants Exposure, and Lung Cancer Risk