You Can Do Your Share For Cleaner Air Limit your driving. Carpool or ride the bus to work. Minimize cold starts by combining trips. Most vehicle emissions occur when an automobile's engine is cold. Avoid jack-rabbit acceleration.
Fast starts use more gasoline than slow ones.
Avoid excessive idling. Drive during off-peak hours to avoid traffic. Avoid highway construction and drive-through windows. Drive your lowest emission vehicle, usually your newest and most fuel-efficient car. Refuel carefully and in the evening when it's cooler.