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.
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.
Examines the large scope of habitat destruction around the world including deforestation and the depletion of endangered species, and describes ways in which science is helping to halt this destruction.
