Chemicals 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. Scientists Warn Against Breathing in Secondhand Vape 'Smoke' Newsweek Study suggests switching from smoking to vaping indoors may reduce children's secondhand exposure to nicotine Secondhand Smoke and Electronic Cigarette Aerosol Resources US EPA What Are the Risks from Secondhand Vape Smoke? NVB Inc.