The Imperial Capital and even many cities are covered with dust. Where does the sand come from?

Beijing is now seriously affected by smog. On March 5, 20021year, Beijing has upgraded its sandstorm warning. At present, there are quite serious sandstorms in many places in Beijing, which have greatly affected the lives of local people. In fact, the visibility in most parts of Beijing is not enough 1 km now, and it may continue to deteriorate in the next few hours or even more than ten hours. People need to wear corresponding protective masks and take corresponding protective measures when going out in the local area, otherwise they may be injured by sandstorms.

Sandstorms in Beijing actually flock to Beijing from three directions: 1 Alashan League in Inner Mongolia, Bayannaoer League, Wulanchabu League and Xilin Gol League, and of course the Loess Plateau in northern Hebei. To put it bluntly, sandstorm means that the local area is in the desert. With the desert, once there is wind, when the wind is relatively strong, this kind of sandstorm will be caused. This is a combination of sandstorms, because the combination of sandstorms has formed a disastrous weather phenomenon for human beings. The outbreak of sandstorm is closely related to greenhouse effect and climate change.

At present, many areas are cutting down forests. A large number of trees are cut down in some areas, which leads to the transition of natural development, and some even over-cultivate, which will lead to the destruction of the natural environment and the strengthening of sandstorms. In fact, to solve this sandstorm problem, in the final analysis, we still need to do some environmental protection, or environmental protection is not enough, and some vegetation can not be effectively restored, so it is difficult to prevent sandstorms. Sandstorms do need a certain protection system, for example, a large number of trees will be planted in some areas to prevent the impact of sandstorms on cities.

In fact, anyone who knows Inner Mongolia above the map of China will know very well that there are two deserts above Beijing, which are actually only a few hundred kilometers apart. Once a strong airflow is formed, it will blow dust to Beijing, or even to Beijing. After all, there have been 6~8 gusts in some areas. These winds will blow some dust into the sky, and some dust will be very small, so they will move at a very fast speed under the action of the wind. Of course, in the face of sandstorms, we must take corresponding protective measures and wear masks. Otherwise, the dust will be inhaled into our lungs, which may cause serious damage to our lungs, thus affecting our health and even endangering our lives.