Many people's understanding of haze is mostly the cloudy air in winter and the fog that people and animals can't distinguish 100 meters away. When the season turns warm, people no longer use air purifiers and masks, believing that the sun shines in the sky, and the haze is also scattered. In fact, although haze is most severe in winter, it still exists in other seasons. Different from winter, there is no haze in spring and summer, and the duration of moderate haze is longer than that in winter. However, compared with severe haze lasting for a long time in winter, mild haze and moderate haze are common in spring and summer.
From about 12 years and 13 years ago, people realized that the fog like weather in winter may not be as harmless as imagined, and the concept of haze began to popularize. In 2014, haze was listed as one of the natural disasters. The main components of haze are sulfur dioxide, nitrogen oxides and inhalable particles. In fact, sulfur dioxide and nitrogen oxides are gaseous pollutants, and the components that really play a key role in haze are inhalable particles. As if the particles in the air are integrated with the air pollution.
In recent years, with the increasing frequency of haze, the household air purifier, which was rarely seen, has become popular. PM2.5 laser Dust sensor Tell you whether the haze in spring is serious or not. In use, many people only use it when the haze is heavy. In fact, the use of air purifier can not be solved only by opening it several times when the situation is serious. It needs users to use it for a long time to get the proper effect.