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, Many Adults Don't Think Exposure To Vaping Is Bad For Kids 90.3 KAZU Secondhand e cigarette aerosols expose kids to less nicotine than cigarettes, study finds, but can still be risky CNN Debunking 7 Myths About Secondhand Smoke What is Secondhand Smoke? Allergy & Asthma Network