Desertification: its human costs

Article Abstract:

The human costs of desertification can be analysed in terms of its social and economic impact on human activity. Desertification implies a continuum of declining production and income levels with related increases in poverty. Prolonged drought conditions manifest in hunger, migration, and high infant mortality rates. The economic impact of desertification includes low per-acre crop yields, lower price levels, and diminished rangeland productivity. The social repercussions range from increased hardship for women and threat to entire cultures to social unrest and armed conflicts.

Social aspects, Influence, Famines, Droughts, Desertification

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Rational equipment selection method based on soil conditions

Article Abstract:

Some of the views of Ali Touran and Thomas C. Sheahan regarding the selection of construction equipment based on a soil mechanics model invite comment. Although the authors considered conventional field conditions in their study, they should have also considered actual field operations to accommodate a number of conditions regarding their problem statement. However, the authors feel that the results of their study confirmed the consistency of their soil mechanics model in selecting construction equipment.

Construction industry, Purchasing, Equipment and supplies, Construction equipment

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Soil erosion estimates and costs

Article Abstract:

Global soil-erosion figures used in a study on economic costs of erosion are disputed. Sourced cited and uncited by the original paper are discussed, and a reply is included.

Research, Soil erosion, Environmental economics, Letter to the Editor

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