In secondhand vape, scientists smell risk Health cherokeephoenix.org Secondhand Smoke and Electronic Cigarette Aerosols US EPA About one in four adults in California report being exposed to secondhand smoke or vape in the past two weeksoften on sidewalks, at home, and in recreational spaces like parks and beaches. Does cannabis create thirdhand smoke? Thirdhand Smoke Resource Center Researchers Warn of Potential Harm From E Cigarette Secondhand Vapor AZPM