Chemicals E Cigarettes (Vapes) Smoking and Tobacco Use CDC Secondhand exposure from vaping marijuana: Concentrations, emissions, and exposures determined using both research grade and low cost monitors ScienceDirect Second hand e cigarette vapour increases risk of poor respiratory health, study finds Nursing in Practice Secondhand Smoke Social Media Message Library Tobacco Education Clearinghouse of California Vaping: what you need to know ASH