I can do it at home, the smell won't linger': Do youths who vape know what they're inhaling? CNA Lifestyle All about vapes what's in them, how do they work, and more Philip Morris International Does Vaping Cause Lung Cancer? If someone smokes outside, do they bring thirdhand smoke indoors with them? Thirdhand Smoke Resource Center Have you ever breathed in secondhand vapor from a vape? What exactly are you inhaling? It turns out it's a lengthy list of chemicals. FULL STORY