How can the naked eye distinguish smog from fog?

Fog is a physical phenomenon when the capacity of water molecules in the atmosphere reaches a certain level. Fog usually occurs when the water vapor is sufficient, the atmosphere is stable and the relative humidity reaches 100%. Generally speaking, fog can be clearly felt when the visibility is less than one kilometer due to the condensation of water vapor.

end

doubt

1

Haze is a mixture of fog and haze. When the humidity is high in the morning and evening, there are many components of fog. When the daytime humidity is low, haze is the main force, and the relative humidity is between 80% and 90%. Among them, fog is a natural weather phenomenon, and the water vapor in the air is dense. Although dust is the condensation core, it is generally non-toxic and harmless; The core substances of smog are substances suspended in the air such as smoke and dust. The relative humidity of the air is below 80% and the color is yellow. Gas can directly enter and attach to human lower respiratory tract and lung lobes, which is harmful to human health. The formation of haze weather is mainly man-made environmental pollution, and natural conditions such as low temperature and little wind make it difficult for pollutants to spread.

2

As the name implies, smog is a mixture of fog and haze, with high relative humidity and low visibility to form fog; Humidity is 80% to 90%, except that water vapor is mixed with dust, smoke and other substances, which is called smog.

three

There are two kinds of smog, one is generally non-toxic and harmless, although dust is the condensation core; Another core substance of smog is smoke, dust and other substances suspended in the air. The relative humidity of the air is below 80% and the color is yellow. Gas can directly enter and attach to human lower respiratory tract and lung lobes, which is harmful to human health.

end

The difference between fog and smoke

Haze has more substances than fog. Fog only contains water vapor, and at most it contains a little dust. The relative humidity reaches 100%, and it feels like a fairyland on earth.

Weather in which water vapor contains other substances or floating objects is called haze. For example, the environment on land, especially the automobile exhaust, deteriorates, and sometimes the fog is easy to contain other substances and floating objects, so sometimes it will form smog. In the ocean far from the mainland, there is no human damage to the environment, where only foggy weather occurs.

Foggy days are white to the naked eye, while foggy days are cloudy with yellow. The darker the color, the more serious the smog.

end

Matters needing attention

Looking at the sky is the most basic way for us to distinguish fog from smog.