Editing Fog (section)

== Visibility effects ==
[[File:Свјетлопис аутопута у Србији, магле и Сунца.jpg|thumb|right|Fog in Serbia|upright]]
[[File:20080313 Foggy Street.jpg|thumb|left|Light fog reduces visibility on a suburban street, rendering the cyclist very hazy at about {{convert|200|m|yd|abbr=on}}. The limit of visibility is about {{convert|400|m|yd|abbr=on}}, which is before the end of the street.]]
Depending on the concentration of the droplets, visibility in fog can range from the appearance of haze to almost zero visibility. Many lives are lost each year worldwide from accidents involving fog conditions on the highways, including [[multiple-vehicle collision]]s.

The aviation travel industry is affected by the severity of fog conditions. Even though modern [[Autoland|auto-landing]] computers can put an aircraft down without the aid of a pilot, personnel manning an airport [[control tower]] must be able to see if aircraft are sitting on the runway awaiting takeoff. Safe operations are difficult in thick fog, and civilian airports may forbid takeoffs and landings until conditions improve.

A solution for landing returning military aircraft developed in World War II was called [[Fog Investigation and Dispersal Operation]] (FIDO). It involved burning enormous amounts of fuel alongside runways to evaporate fog, allowing returning fighter and bomber pilots sufficient visual cues to safely land their aircraft. The high energy demands of this method discourage its use for routine operations.