Secondhand e cigarette aerosols expose kids to less nicotine than cigarettes, study finds, but can still be risky CNN Marijuana and Vaping: Shadowy Past, Dangerous Present The New York Times Secondhand Smoke Washington State Liquor and Cannabis Board The Dangers of Secondhand & Thirdhand Smoke Exposure E Cigarettes (Vapes) Smoking and Tobacco Use CDC Secondhand bong smoke worse than that from tobacco, study finds Cannabis The Guardian