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In our daily life, we often encounter the phenomenon of "fog" and "haze". Both fog and haze are meteorological phenomena caused by particulate matter in the air, but their causes and characteristics are very different. Simply put, fog is naturally formed, while haze is caused by human activities. We can summarize the difference between "fog" and "haze" in one sentence, that is, "natural fog, artificial haze".
natural fog
Fog is a natural meteorological phenomenon, usually in the evening or early morning. When the atmosphere is stable and the water vapor and humidity in the air are sufficient, they will condense into small water droplets when the temperature of the formation is slightly lower, and then form fog, which will form a thin layer of white or gray mist suspended in the air. In severe cases Reduces visibility, but dissipates in bright sunlight and warmer surfaces. Special attention should be paid when driving in foggy weather, because the fog will reduce visibility and obstruct the line of sight, thereby increasing the risk of accidents and accidents. In addition, because there is little wind in foggy weather, many tiny particles and bacteria in the air are likely to be dissolved in fog droplets. Prolonged exposure to these pollutants may cause respiratory and cardiovascular diseases, so foggy weather Try to avoid going out and outdoor activities when you are sick.
man-made haze
Haze is a meteorological phenomenon formed by the combination of pollutants in the atmosphere and water vapor, also known as Dust-haze. Compared with natural fog, haze is an environmental problem caused by human activities. Pollution sources such as coal use, industrial emissions, vehicle exhaust, and garbage incineration are the main causes of haze. These complex pollutants accumulate in the atmosphere and combine with water vapor to form microscopic aerosols that increase the concentration of particles in the air and cause reduced visibility. Haze not only causes great harm to human health, but also damages the vegetation, soil and water bodies in haze-polluted areas, causing great damage to the environment and ecological balance.
Difference Between Fog and Haze Compare the Difference Between Similar Terms
| Identification method | Fog | haze |
| color | Visual color is usually white | Visual color is usually yellow or orange |
| visibility | Visibility less than 1 km | Visibility less than 10 km |
| Relative humidity | close to 100% | Less than 75% |
| daily change | Often seen from midnight to early morning | can happen any time of the day |
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References
1. haze- Wikipedia
2. Fog- Wikipedia
3. The pictures in the article are all from the CC0 free gallery.
