We all know that the exhaust gases that coming from our vehicles contains poisonous gases and micro particles. For example the exhaust from a diesel engine contain more than 40 air contaminants. The micro particles that emitted from exhaust can be easily reach our lungs. We cannot completely get rid of from these gases but are we avoiding it to the level that is possible for us. 1. The underground parking in shopping mall and cinema halls are deadly dangerous as the concentration of the exhaust gases are much high at these places. If there is option of outside parking opt for it. 2. Park the vehicle with rear always outside. This will reduce the chance of entering the gases inside the home and also spreading the gases outside much freely 3. Do not start the vehicle when people are about to enter or waiting near the rear. First allow them to sit inside close the windows and then reverse the car. If want to open the windows open it after moving few distances. While reversing the front passengers are at the risk of breathing the gas if windows are open. 4. Do not always run in recirculation mode, use fresh air option frequently. 5. In traffic jam close the window with ac in recirculation mode. 6. Do not idle in residence area. 7. Keep lot of plants near the garage. 8. Switch of the engine when tail gate is opened. 9. When getting out of the car switch of the car before occupants exit from it especially while carrying infants. These some points that came to me. Please share if you have more points to make.