Read, listen and check your answers.
If soil is looked after, it can be used again and
again. If it is treated badly, many problems such
as desertification can be caused. Soils in
mountain and semi-desert areas are most at risk.
If too many trees and grasses are removed by
people or by animals, the soil becomes poor and is washed away by rain, or blown
away by the wind. One-third of the world's land area is at risk of soil erosion and
desertification. Wood and charcoal burning destroys forests, removing soil and making
land into desert. Desertification can be stopped by expensive tree-planting programmes
and better land-management.​

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