Debunking 7 Myths About Secondhand Smoke SHARE: If you smoke or vape in your car in the presence of others especially children you're exposing them to harmful secondhand smoke or aerosol. Cracking windows is NOT enough, Secondhand e cigarette aerosols expose kids to less nicotine than cigarettes, study finds, but can still be risky CNN Parents' Pot Smoking Means More Colds, Flu for Kids Get Smart About Drugs