land degradation

Describes soil degradation from erosion, contamination, and intensive agriculture; presents diagrams of soil structure; and discusses sustainable agriculture, the efforts of national governments to protect soil, and future needs for soil protection.

Examines the problem of land degradation through erosion and deforestation, discussing how these processes occur and what effects they have.

Discusses the important role soil plays in environmental health, describes the impact of erosion and contamination, and explores how countries are dealing with the issue of land degradation.