The reason for Beijing’s yellow sand

Beijing yellow sand refers to the phenomenon of sandstorms appearing in the sky in spring or autumn, resulting in a large amount of sand dust in the air. The main cause of Beijing's yellow sand is the Mongolian plateau and desert areas close to Beijing. Coupled with drought and strong winds, the soil on the ground does not have enough vegetation coverage, causing a large amount of dust to be blown up by the wind and floated to the Beijing area. In addition, human activities are also one of the important causes of yellow sand in Beijing. For example, construction and traffic during urbanization will increase the exposed area of ??the ground, making it easier for wind and sand to blow up. In addition, farmers' planting and grazing habits may also lead to land degradation and desertification, thereby exacerbating the yellow sand phenomenon. In general, the cause of yellow sand in Beijing is the combined impact of the natural environment and human activities, and it requires the concerted efforts of the whole society to reduce the harm caused by yellow sand.