Secondhand smoke may be a substantial contributor to lead levels found in children and adolescents, new study finds Secondhand Smoke and Electronic Cigarette Aerosol Resources US EPA Sleeping baby safety tip: Keep baby's environment smoke and vape free. Secondhand smoke in areas where a baby sleeps or spends time, like home or the car, increases the risk of health problems. Project Filter Secondhand Vape Informational Poster #2 Idaho Health Tools