Secondhand marijuana smoke: What are the risks to your health? UCLA Health Do electronic cigarettes create thirdhand chemical residue? Thirdhand Smoke Resource Center Focused on the Facts: Secondhand Marijuana Smoke American Nonsmokers' Rights Foundation no smoke.org Secondhand Smoke vs Vape: What the Science Says Secondhand Vape Exposure: Effects, Who's at Risk, and More In secondhand vape, scientists smell risk American Heart Association