Secondhand Smoke Vermont Department of Health 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, Thirdhand Smoke Resource Center Protecting Californians Even short term exposure to secondhand smoke is detrimental to your health, especially your kids. Learn more about the dangers at the link in our bio. Health Risks of Secondhand Smoke and Aerosols Factsheet US EPA Don't Be Fooled, E cig Aerosol Is Not Harmless for Kids American Lung Association