Investigation method of writing research report on the causes of haze weather

With the deterioration of the air, the phenomenon of cloudy days has increased and the harm has increased. Recently, there will be early warning and forecast of cloudy weather in many areas of China. Collectively referred to as "smog". From my understanding, fog and haze are completely different to some extent. When there is fog, the air is wet. When smog occurs, the air is relatively dry. It is formed because of this tiny dust, which is represented by the symbol "∞". Haze changes are generally not obvious. When the air mass has not changed greatly and the air mass is relatively stable, it lasts for a long time, sometimes as long as ten days. Because of the weather phenomena such as haze, light fog, sand blowing and smog, it is sometimes difficult for meteorological professionals to distinguish them. We must combine the weather background, sky conditions, weather temperature, color and smell to draw a correct conclusion.

Hazards of smog

After introduction, the smog is terrible. Here, I hope that some children who are not sensible will try not to breathe outdoors in foggy days. Some people want to wear anti-fog masks when they are outdoors. If you breathe a lot of air outdoors, it will lead to death. Therefore, we must not underestimate this thing.

Four. Research opinion

It is said that the smog is terrible, but he is not so terrible; It is said that smog is not terrible, but it is really scary. As long as everyone can set off less fireworks, smoke less and plant more trees. We can breathe more fresh air. In this way, our natural disasters will be reduced. Let's protect the environment, starting with me! Sources of toxic particulate matter in cities: firstly, automobile exhaust. The Puwei server imported from the United States has good filterability, which is both anti-particle and waterproof. The filtration efficiency is 99.8% for particles as small as 0. 1 micron, and 99.9% for bacteria or virus carriers as small as 0.3 micron (common in droplets). SecureFit patented technology is adopted to adapt to different face shapes and achieve a high degree of fit. For the health of you and your family, wear a mask when you go out.