Not only does it waste fuel, but idling also puts out a lot of unnecessary pollutants. A good rule of thumb is to turn your car off if you are sitting in traffic for more than 10 seconds. Next time you are waiting for someone, be sure to turn your car off. Don’t start your car ahead of time on a cold morning – the best way to heat it up is to start driving it. And opt to go into a restaurant instead of using the drive thru. Making these simple changes can save a lot of pollution.