61.   Dust clouds reduce visibility to zero.

62.   Elsewhere in the country, freezing fog reduced visibility on many roads, and motoring organizations renewed appeals to drivers to stay home.

63.   Fog had reduced visibility at the airport at time of the accident.

64.   Fog reduced visibility in Milan and Parma but completion of the two games was never at risk.

65.   For the past four days, strong currents stopped them latching on to the Kursk and clouds of silt reduced visibility on the bottom to near zero.

66.   French troops continued to check cars along the main road, but reduced their visibility and began disembarking.

67.   French troops continued to check cars, but reduced their visibility and continued to pull out.

68.   French troops continued to check cars, but reduced their visibility and began disembarking.

69.   French troops continued to check cars, but reduced their visibility and began to pull out.

70.   Haze from the fires has reducing visibility and forced some local flights to be delayed.