Black storm weather

Tornado is a strong, small-scale air vortex, which is produced by strong convective movement of air in extremely unstable weather. It is a strong cyclone produced by funnel-shaped clouds (tornadoes) extending from the bottom of thunderstorm clouds to the ground. Its wind power can reach more than 12, and the maximum can reach more than 100 meters per second, usually accompanied by thunderstorms and sometimes hail. Sandstorm is a disastrous weather phenomenon in which wind and sand interact. Its formation is closely related to global greenhouse effect, El Nino phenomenon, forest decline, vegetation destruction, species extinction, climate anomaly and other factors. Among them, excessive exploitation of natural resources, excessive deforestation and excessive land reclamation caused by population expansion are the main reasons for frequent sandstorms. Sandstorm usually occurs at the turn of spring and summer, and its formation is related to atmospheric circulation, topography and climate factors, as well as man-made ecological environment destruction. This is a symbol of the intensification of desertification. The rapid growth of population has brought unreasonable land reclamation, overgrazing, excessive logging and monoculture, which will inevitably lead to the destruction of vegetation and surface structure, grassland desertification and ecosystem imbalance. Because this sand-making speed is much faster than that of people, it undoubtedly provides conditions for the formation of sandstorms.

The occurrence of sandstorm is the result of the comprehensive action of population, resources and environment. The raging sandstorm is challenging and warning mankind. If human beings can't control development, if their infinite desires contradict the limited resources of the earth, and if they can't help each other with nature, they will eventually be defeated by themselves.