Answer: Fogs
Explanation:
Fog is a visible aerosol consisting of tiny water droplets or ice crystals suspended in the air at or near the Earth's surface. They are colloquially known as ground clouds.
In order for fog to form, dust or some kind of air pollutants needs to be in the air. They are formed when the difference between air temperature and dew point is less than 2.5 °C (4.5 °F). Fogs reduce visibility to less than 1000meters.
