DISAPPEARING HABITATS

Everywhere in the world people are using up more and more land. In many places an area of forest is cut down to make room for crops. When all the goodness in the soil has been used up, the people move on to another place. they leave the forest to go back again. but this takes time. Large herds of sheep and cattle need space to graze. They eat all the grass. Then, when there's none left, they eat any roots or leaves they can find. They trample the earth until it's hard. The soil becomes bare and dusty like a desert.(childcraftvol4)