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, Tobacco Smoke, Vaping, and Asthma AAFA.org 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. Secondhand Smoke Vermont Department of Health Health Risks of Secondhand Smoke and Aerosols Factsheet US EPA