Here's how your dab pen and vape could affect your mental health National Geographic Secondhand e cigarette aerosols expose kids to less nicotine than cigarettes, study finds, but can still be risky CNN How Vape Pens Could Threaten the Pot Legalization Movement Mother Jones Secondhand Smoke Contra Costa Health Vaping Cannabis Produces Stronger Effects Than Smoking Cannabis For Infrequent Users Johns Hopkins Medicine