soil degradation

Discusses how the contamination, depletion, and erosion of soil affects the food supply.

Discusses the formation and the role of different types of soils and how they have been endangered through unwise farming, mining, and grazing.

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

Discusses how the contamination, depletion, and erosion of soil affects the food supply.