Rethinking Vaping WHAT'S THE DIFFERENCE BETWEEN SMOKE AND VAPOR? Vape Domain E cigarettes can result in 'Popcorn Lung' Are they safe to inhale?': Vaping liquids in Canada contain potentially harmful chemicals, tests show CBC News Chemical exposure Vaping versus smoking Vaping is often marketed as a safer alternative to smoking, but many vape products contain nicotine, harmful chemicals, and heavy metals that can harm developing brains and lungs.