file · web viewpoorest affected - 250 mil people / 1 bil - at risk of food shortage....
TRANSCRIPT
Desertification - Process of land chang-ing from farmable, pro-ductive land into desert
Cause 1 - Cattle Over-grazing - animals eat too much plant life
Movement of cattle compacts soil
Large # of animals feeding in one area —> complete loss of vegetation
Cause 2 - Deforestation — cutting of trees
Loss of vegetation & roots that stabilize the ground
Result: Soil not able to absorb H2O easily - flood-ing possible
Reason for cutting trees - fuel, heating, cooking
Increased population —> increased cutting
Shade removed - soil in direct sunlight
Soil temp increases - H20 leaves soil
Salination of soil = salt content increases
Result: soil becomes useless
Result: Estimated total money lost each year from desertification = 42$ bil
Appx. 50 mil people dis-placed - next 10 years
Mass migration
Each year - 6 mil. hectares of farmable land —> de-creased food production
Increased prices of food - due to loss of farmable land
Poorest affected - 250 mil people / 1 bil - at risk of food shortage
Dec. food prod. —> in-creased food prices, esp. staples like wheat, rice, corn
Ex: wheat cost up 130% in 2008
Poor countries - no money to prod. food - cannot af-ford imported food
Global effects of De-sertification