China, in the heart of the desert GEBI and was once a great city.

Livestock is one of the causes of the problem. In good years, Fame increase the number of cattle. After a year, no rain to come. Farmers do not want to kill all theircattle, so that cattle eat grass and develops the inevitable rain.
Farmers do not want to kill all his cattle, so cattle can eat grass and everything that grows on the poorest soils. If this happens many years, the grass has stopped growing and the land is desert. Proposed response to farmers to reduce the number of animals.

Another problem is that good soil is lost and beyond. When cutting the trees down, there is nothing on the ground holding the position on the hill. So if, when the rain washes the earth, mountains and rivers. Strong winds may also blow away the precious soil, on top of the field.