Don't Pollute Yourself The Real Cost How do vapes work and what chemicals are inside them? BTN High What's hiding in that vape puff? Vapes might look clean or harmless on the outside, but inside the aerosol is a mix of chemicals and metals created when the liquid is heated. High concentrations of flavor chemicals are present in electronic cigarette refill fluids Scientific Reports Vaping, Environmental Toxicants Exposure, and Lung Cancer Risk