Is the sandstorm good?

When sandstorm occurs, it will cause serious harm to agriculture, forestry, animal husbandry, electricity, communication, traffic and people's lives and property. Sandstorms often cause four kinds of hazards. First, strong winds destroy buildings, roads, bridges, trees and houses, causing fires, causing human and animal casualties, and sandstorms will also cause various traffic accidents and grounding of aircraft (trains); Second, sandstorms bury farmland, irrigation canals, cottages, railways, grasslands and so on. Third, the environmental pollution is serious. According to analysis, the air quality in cities where sandstorms pass will deteriorate by 2 to 5 times, and it can reach dozens of times in an instant. Turbid air poses a serious threat to human health and induces allergic diseases, epidemics and infectious diseases. The fourth is the wind erosion hazard. It scraped away the fertile soil and crops on the surface of farmland, aggravated the development of soil wind erosion and desertification, and the thick dust covering the leaves of plants also affected the normal photosynthesis, resulting in crop yield reduction.