E cigs and Vaping: How Are They Impacting Our Youth? Vapes Down Campaign Groesbeck Independent School District While humidifiers release only HO, vapes release formaldehyde, lead, arsenic, and more. Don't be fooledvape clouds carry toxic chemicals that can seriously harm your lungs. NOT (Not on Tobacco) is a free What's Actually in Your Vape: A Complete Chemical Breakdown E cigarettes examined: Do they contain formaldehyde?