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Mist is a phenomenon caused by small droplets of water suspended in air. It can occur as part of natural weather or volcanic activity, and is common in cold air above warmer water, in exhaled air in the cold, and in a steam room of a sauna. It can also be created artificially with aerosol canisters if the humidity conditions are right.
The only difference between mist and fog is visibility.1 This phenomenon is called fog if the visibility is one kilometre (1,100 yards) or less (in the UK for driving purposes the definition of fog is visibility less than 100 metres (UK Highway Code rule 226),2 for pilots the distance is 1 kilometre). Otherwise it is known as mist. Seen from a distance, mist is bluish, and haze is more brownish.citation needed
When driving in the UK, fog lights must only be switched on when the visibility is less than 100m, if visibility increases to more than 100m fog lights must be switched off.
"Scotch mist" is a light steady drizzle.
Mist usually occurs near the shores, and is often associated with fog. Mist can be as high as mountain tops when extreme temperatures are low.
Freezing mist is similar to freezing fog, only the density is less and the visibility greater. (When fog falls below 0 degrees Celsius in temperature it becomes known as freezing fog.)
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