What is haze weather?

Now the word smog is often heard in the news. In fact, smog is two words, consisting of fog and haze. What's the difference between fog and haze?

Fog, mainly a weather phenomenon that often occurs in the morning and evening, is the condensation of suspended water vapor in the atmosphere, which reduces visibility. Generally, the visibility of fog is less than 1000 meters.

Haze is a visual obstacle caused by an aerosol system consisting of a large number of particles suspended in the air. (Note: The relative humidity of smog is very small, and the composition of smog is composed of a large number of particles. )

Water vapor condenses in fog, which is composed of particles, so fog is less harmful to human body, while smog is more harmful to human body.

Sandstorm is a general term for sandstorm and sandstorm. It refers to a severe sandstorm weather phenomenon in which strong winds blow and drag a large amount of sand and dust on the ground into the air, making the air particularly turbid and the horizontal visibility less than one kilometer. Among them, sandstorm refers to a sand-laden storm formed by strong winds blowing a large number of sand near the ground; Sandstorm is a storm formed by strong winds, which brings a lot of dust and other particles into the sky.