What is an effect of cooling air below its dew point?

Cooling air below its dew point results in condensation. The dew point is the temperature at which air becomes saturated with moisture, meaning it can no longer hold all the water vapor in its gaseous state. When air is cooled below this critical temperature, the moisture present in the air begins to condense into liquid water droplets. This is the principle behind various natural phenomena such as fog, dew, and cloud formation.

For instance, on a cool evening, the temperature can drop and cause moisture in the air to condense into dew on grass blades. This illustrates how cooling air below its dew point is significant in meteorology and environmental science, as it directly influences weather patterns and climate conditions.