Fog and mist are similar meteorological phenomena, but there are some key differences:

1. Intensity:
   • Fog: It is denser and significantly reduces visibility, usually to less than 1 km, and can even reach zero in extreme cases.
   • Mist: It is less dense than fog, and visibility is usually greater, generally between 1 and 5 km.
2. Composition:
   • Both are made up of tiny water droplets suspended in the air, but fog typically forms when there is high humidity and a large amount of water vapor condenses into very small droplets near the ground.
   • Mist is also made of water droplets, but it often forms in conditions of high humidity and sometimes in areas of higher temperature than fog.
3. Effect on the weather:
   • Fog: It can last longer and affects visibility more, which can create hazardous conditions for driving or navigation.
   • Mist: It tends to dissipate more quickly, especially when the sun rises or the temperature increases.

In summary, the main difference is that fog is thicker and reduces visibility more than mist.