What does fog mean?

Fog is a natural weather phenomenon. When the relative humidity reaches 100%, the water vapor in the air will condense into fine water droplets suspended in the air, which will reduce the visibility on the ground. This weather phenomenon is called fog. Fog is more common in spring from February to April. When the visibility in the atmosphere is lower than 1 km due to the condensation of suspended water vapor, meteorology calls this weather phenomenon fog. Conditions for fog formation: cooling, humidifying and increasing water vapor content. The types of fog are radiation fog, advection fog, mixed fog, evaporation fog and smoke.

Light fog is called haze, and dense fog is called haze.

Nowadays, due to environmental pollution, the air is filled with all kinds of dust, and the haze weather has little to do with air humidity. When there is no wind, there is always smog.

Dust from construction sites, smoke emissions from industrial enterprises and automobile exhaust emissions are the main causes of haze weather.