Learn how fog forms when water vapor condenses on bits of dust suspended in the air
Formation of fog along mountain slopes.
Encyclopædia Britannica, Inc.
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Transcript
NARRATOR: Fog is formed when the amount of water vapor in the air exceeds 100 percent relative humidity and condenses on bits of dust suspended in the air. The saturation point can be exceeded when warmer, moist air rises and adiabatically expands. This is the cause of the fog forming along these mountain slopes.
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