Mist and Fog
Mist occurs when warm, moist air cools and the moisture is condensed. Sometimes this falls as dew, but at others, such as still evenings, it remains in the air as mist, but it is much denser, and more dangerous as visibility is much less. Smog is when fog becomes mixed with smoke of carbon dioxide fumes from car engines, to form a thick, dirty smelling atmosphere. Smog is now being controlled in many urban areas by the use of smokeless zones, but the problems of exhaust fumes still exist. Mist and fog also add to the mood of the person. Mist creates a pleasant atmosphere around people.