If you want to test your car for smog, you can take it to those smog test centers. Smog is a poisonous gas that comes out of your car when your car does not have a clean engine or when it is not working so well anymore. It is very important to deal with smog at its first sight because smog can be very dangerous to people around. Smog can also cause pollution in the air around us and that is bad. To help eliminate smog from the air, you need to have your car checked to see if it is emitting poisonous gasses. There are many centers that you can go to to have your car checked and tested and when you go to such places, you can get a lot of benefits from them.