Sandstorm weather often occurs in northern areas. What do you have to say? What can we do? composition

Afforestation, returning farmland to forests and grasslands, prohibiting overgrazing, protecting existing forests and grasslands, etc.

According to reports, the occurrence of sandstorm weather is closely related to wind power, surface conditions and high-altitude convection. "Although human beings are weak in the big weather system, they can make a difference." Liu Jiyuan, a researcher at the Chinese Academy of Sciences, stressed that "the key to governance lies in the farmland cultivation areas on the edge of desert and arid areas. Arid areas mainly solve the problems of grassland and cultivated land, not woodland. Some degraded grasslands should be resolutely returned to pasture to reduce the pressure on grasslands. It is necessary to vigorously promote the cultivation method of leaving high stubble, that is, leaving about one foot of high stubble at harvest time every year to become a windbreak barrier. In addition, no-tillage should be done as far as possible when sowing again to reduce the source of dust. These methods have been well implemented in the United States and Russia, which greatly weakened the black storm. China has also developed corresponding agricultural machinery and tools, which should be vigorously promoted. "

The scientist warned that the recent remote sensing monitoring showed that in the past five years (1996-2000), the large-scale reclamation activities in the farming-pastoral ecotone in Inner Mongolia continued, and the situation was very bad from eastern to central Inner Mongolia to northern North China. The main reclamation is grassland, which will increase the source of dust.

"The most important technical measures to slow down and control sandstorms are to implement sand control projects with the protection and development of forest and grass vegetation as the core, scientifically do a good job in returning farmland to forests and grasslands, establish effective ecological barriers, and reduce and prevent sandstorms." Wan Bentai, director of China Environmental Monitoring Station, pointed out the direction for controlling sandstorms.

A survey by the Ministry of Science and Technology, the State Environmental Protection Administration and other departments shows that the ecological environment in the west of China is not optimistic, and problems such as vegetation decline, land degradation and water shortage still plague people living there, which is also closely related to the occurrence of sandstorms.

For the ecological environment in the west that needs to be improved urgently, experts also put forward countermeasures: adopting the ecosystem management model, changing the current single-factor and segmented ecological protection and construction model, and the state should strengthen unified supervision over ecological protection; We should take the integrity of ecosystem structure and the soundness of ecological function as the management goal of ecological protection, and not just take a single index such as vegetation coverage as the standard to measure the quality of ecological environment; It is necessary to formulate ecological protection laws and regulations as soon as possible to protect the ecological environment according to law.