Does Rolling Down the Window While Smoking Help Improve the Air Quality in Your Car?
Doctors say second hand smoke from just one cigarette in a car is very unhealthy for a child.
California Researchers measured air quality in the back seat of a car while the driver smoked with the window down.
They found pollutant levels - including nicotine and carbon monoxide - were three times higher inside the car.
Second hand smoke can increase a child's risk of asthma and allergies.