Sandstorm reading answer

1: Strong winds roll up a large number of sandstorms, causing air turbidity and sandstorm weather with visibility less than 1000 meters.

2. Sandstorm, a weather phenomenon, has existed since ancient times and has played a certain role in the ecological balance of the earth. Dust contains alkalinity, which can balance the acidic substances in the atmosphere, thus slowing down the occurrence of acid rain. Dust not only plays an important role in the distribution and replenishment of soil, but also plays an important role in the global water cycle.

3. A large number of forests are cut down, land is over-reclaimed, factories are built blindly, and emissions are not controlled, which leads to ecological changes. Dust storms are mixed with harmful components discharged by industrial and mining enterprises and germs and viruses in livestock manure. After being disturbed by human factors, the wind erosion rate in nature is much higher than the generation rate of soil.

4. More convincingly and effectively remind people to protect the environment.

5: Ellipsis