Composition: My yearning (at home in foggy days)

In the past week, there was an "abnormal situation" in our city-smog. Haze has seriously affected the lives of residents. It was gray when I was at school, and I couldn't see anything clearly. This Saturday, my father sent me to the guzheng class, which is almost enough. I didn't see the tall buildings around at that time, and I thought my father was driving the wrong way!

Generally, the fog is milky white like pure milk, and the haze is gray, which is a bit choking. I don't know much about fog and haze, so I looked it up online today. Oh, I see. Fog is an aerosol system composed of a large number of tiny water droplets or ice crystals suspended in the near-surface air, and it is the product of water vapor condensation in the near-surface air. The existence of fog will reduce air transparency and worsen visibility. If the horizontal visibility of the target drops below 1000 meters, the weather of water vapor condensate suspended in the air near the ground is now called fog.

Haze is also called haze. Particles such as dust, sulfuric acid, nitric acid and organic hydrocarbons in the air make the atmosphere turbid, blur the vision and worsen the visibility. With the deterioration of air quality, cloudy days are increasing and the harm is increasing. Recently, many areas in China have incorporated the smog weather phenomenon into the fog as an early warning and forecast of disastrous weather. Collectively referred to as "haze weather".

Smog can make people "relapse", because smog contains pollutants such as bacteria, dust and viruses, and man-made industrial waste gas and automobile exhaust gas seriously affect people's health. Now, some students in our class have a bad cold, and they are listless and look ill. Therefore, everyone must protect the already riddled earth, protect the environment, start from me and let the blue sky and white clouds accompany us forever!