Usually, convection whisks away car fumes. When a temperature inversion occurs, car fumes have no place to go, except into your eyes and lungs. Fortunately, this is unusual. All of the planets have tropospheres. Many weather patterns in the troposphere occur because of convection.
Sea breezes are a good example.
During the day, the land warms up faster than the sea. The air above the ground is hot, the air above the water is cold. The hot air above the land rises, and the cold air above the sea swoops in to take its place. This causes a wind to blow from the ocean toward the land, a sea breeze. At night, the situation reverses.