Give reason:

Fog is dangerous for traffic.

Fog is a visible aerosol consisting of minute water droplets or ice crystals suspended in the air at or near the earth’s surface. In other words, fog can be considered as low lying clouds.

It is very difficult and dangerous to drive in the foggy atmosphere because of the lack of visibility or very low visibility. One should avoid going out for a drive on a foggy day. It is believed to be one of the most dangerous environmental hazards which results in road accidents and death on a large scale during the winter season. Invisibility can seriously deteriorate within a matter of seconds.