Desertification
Expansion of deserts at the margins due to overgrazing and deforestation
"The Bedouin is not the son of the desert, but its father."
North Africa was forested in pre-Roman times
Sub-Saharan Africa
Wind Erosion
Loess soils feed the world
Present-day wind erosion strips topsoil
Burial of vegetation or exposure of roots
Respiratory hazards
Cost of clearing wind-blown sediment from roads