What is fog? The difference between fog and mist explained
(World News UK)

FOG can make the landscape look magical - but also causes travel chaos for drivers. But what exactly is it? Not many people actually know how fog is formed and how it differs from mist. 6 What is fog? Fog is like a low-level cloud that originates from a local body of water - such as a lake, marsh or the sea. It differs from regular clouds because it contains water droplets from a number of different sources. When water vapour in the air condenses into tiny droplets of liquid water, they stay suspended in the air and fog is formed. Fog contains up to 0.5 ml of water per cubic metre. If you were to fill an Olympic sized swimming pool with fog and then somehow condense...