The reasons why vegetation growth promotes the expansion of sand island area are analyzed.

Generally, due to weather changes, the climate in some areas is dry, the vegetation is reduced, sandstorms are prevalent, and the desert area is expanded.

The reason for the expansion of desert area is mainly the destruction of the environment by human activities, which has several hazards. First, it affects human life; The second is to make the weather drier; Third, it is easy to cause sandstorms.

The expansion of desert area is due to the destruction of vegetation in arid and rainless areas by human beings, which exposes sandy soil, quickly evaporates a small amount of precipitation and forms desertification for a long time, thus expanding the desert area. Sand grains in the desert are blown up by strong winds to form sandstorms or sand blowing weather, which causes great damage to the environment.